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Organised Crime and Migration: Introduction

Organised Crime and Migration
Introduction
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Notes

table of contents
  1. Series Page
  2. Title Page
  3. Copyright
  4. Contents
  5. Acknowledgements
  6. Introduction
    1. Organised crime and human mobility in the region
      1. The nature of organised criminal groups
      2. Organised criminal groups in Mexico
      3. Organised criminal groups in Northern Central America
    2. Methodology and approach
      1. Fieldwork in Mexico and El Salvador, 2015
      2. Ethical considerations
      3. Data analysis
      4. The morphogenetic approach: a critical realist analytic framework
        1. The Structure–Agency Impasse
        2. Mixed Flows and Transit Migration
      5. Applying the morphogenetic approach in my data analysis
    3. Engagement and contribution
    4. The structure of the book
    5. Notes
  7. 1. Criminal violence as a driver of internal displacement and external migration
    1. Migration out of Northern Central America
      1. Historical context of displacement and migration in the region
      2. Criminal violence as a driver of migration
      3. New in-country migration controls in Mexico – Plan Frontera Sur
    2. Organised criminal groups and an emerging displacement crisis
      1. Criminal violence in Northern Central America
      2. Understanding external migration driven by organised crime as this new factor emerged
      3. Internal displacement caused by gang violence in Northern Central America
      4. Understanding how organised crime was causing this emerging displacement trend
      5. Understanding the role and response of the state as this new wave of displacement emerged
    3. Organised crime and disorganised movement: conceptualising internal displacement in El Salvador and Honduras
      1. Criminal governance: framing the source of risk
      2. Triggers of flight: levels and immediacy of risk
      3. Fleeing risk: who flees, when and how
      4. Seeking safety: strategies in internal displacement
      5. Displacement dynamics: ostensibly random, fundamentally precarious
      6. Decision-making underpinned by the same logic
    4. Why people leave their country because of criminal violence and persecution by organised criminal groups
      1. Factors that contribute to external flight
        1. Different Levels of Risk, Different Patterns of Mobility
        2. Why Internal Displacement May Not Be Viable
      2. Personal experience of threats or violence and the decision to migrate
        1. Internal Displacement Abandoned in Favour of External Migration
        2. No Internal Displacement Before External Migration
        3. Pre-Emptive External Migration
        4. New Understanding About How Criminal Violence Causes External Flight
    5. Agency and decision-making in displacement caused by criminal violence
    6. Notes
  8. 2. Transit and trajectory through Mexico: navigating risk and finding protection
    1. Locating decisions in transit migration
    2. “I never knew we had a right to be safe”: the right to seek international protection as an influence on migration trajectory
      1. Factors that contribute to determining destination or making asylum claims
      2. Rights information, decision-making and trajectory: morphogenetic analysis
        1. Rights Information and Changes in Destination
        2. Unchanged Destination or Temporary Changes to Plans
      3. How receiving rights information during transit affects migration trajectory
    3. Risk and violence during transit and their impact on migrants’ agency
      1. Migrant experiences in southern Mexico, 2015
      2. Prior knowledge of risk during transit
      3. Criminal attacks during transit
      4. Decision-making following criminal attacks
        1. No Changes to Planned Destination Following Criminal Attacks
        2. Changes to Planned Destination Following Criminal Attacks
      5. Decision-making of those who had fled criminal violence and persecution
      6. How criminal abuse during transit affects migrant agency
    4. Decision-making in transit as part of the migration journey
    5. Notes
  9. 3. Organised crime groups as a threat to migrants during transit
    1. Locating criminal violence and abuse in the transit state
    2. Transit migration: the nature and source of vulnerability and abuse
      1. The vulnerability of people in transit
      2. Violence against migrants in transit: abuse and its systematic nature
      3. The situation in southern Mexico after Plan Frontera Sur
        1. Migrant Agency: Self-Protection Strategies
      4. Perpetrators, operational models and territorial control
      5. The state: impunity, corruption and collusion
      6. Characterising violence during transit migration as structural violence
      7. Contextual factors that enable criminal abuse during transit
    3. The development of organised crime as a structural force during transit: morphogenetic analysis
      1. First phase: organised crime evolves as structural factor in transit migration
      2. Second phase: impact of new migration controls on criminal activity
      3. The causal role of policy
    4. Criminal abuse, policy-driven harm and the role of the state
    5. Notes
  10. 4. People-smuggling through Mexico and the role of organised crime and corruption
    1. Conceptualising people-smuggling
      1. People-smuggling and state integrity
    2. People-smuggling and organised crime in Mexico and Central America
      1. People-smuggling in the region: its role and evolution 2000–15
      2. Criminal actors involved in people-smuggling
      3. The impact of Plan Frontera Sur (2014–16)
      4. Transcontinental links
    3. Migration controls and the evolution of people-smuggling and organised crime: a morphogenetic perspective
      1. The evolution of people-smuggling in Mexico and Central America: morphogenetic analysis
        1. First Phase: Post-2001 Migration Controls
        2. Second Phase: Mexican Security Policy After 2006
        3. Third Phase: The Implementation of Plan Frontera Sur in 2014
      2. Impact of migration controls on people-smuggling and related corruption
    4. Migrant agency in the context of people-smuggling
      1. Migrant agency: constrained by circumstance
      2. Migrant agency: transforming power and emergent properties
        1. First Phase: Agency Leads to Structural Elaboration in Transit State
        2. Second Phase: Agency Continues Despite Previous Structural Elaboration
      3. Impact of agency on the deployment of policy and on its efficacy
    5. People-smuggling, corruption and state integrity
    6. Notes
  11. 5. Law, policy and the state: accountability for adverse consequences, criminal activity and corruption
    1. Externalisation of migration controls under Plan Frontera Sur
      1. Developing perspectives on policy outcomes
    2. Locating understanding about the consequences of policy, the acts of non-state actors and state accountability
      1. Adverse policy outcomes and policy gaps
      2. The externalisation of migration controls and the transit state
      3. State accountability
    3. Deportations under Plan Frontera Sur: state obligations versus policy outcomes
      1. Obligations to those with potential international protection needs
      2. Implementation of Plan Frontera Sur: a morphogenetic perspective
      3. Adverse consequences of Plan Frontera Sur
      4. Deportations that may not meet legal obligations
      5. Financial incentives
      6. Implications of political pressure and financial incentives
    4. The state, abuse by organised crime and impunity
      1. State responsibility for acts of non-state actors: due diligence and beyond
      2. Morphogenetic perspective on state inaction: from tolerance to impunity
      3. Impunity and the foreseeable adverse consequences of policy: insight from morphogenetic analysis
      4. Implications of ‘collateral damage’ for notions of state accountability
    5. The state and people-smuggling: the nexus of migration and corruption
      1. Coexistence and collusion
      2. Weakened state integrity
      3. Implications of corruption for notions of state responsibility
    6. The dimensions of the state’s role and responsibility
    7. Notes
  12. Conclusions and reflections
    1. Contributions to knowledge and understanding about the empirical situation
      1. Displacement and migration caused by organised crime in Northern Central America
      2. Abuse during transit in Mexico
      3. People-smuggling through Mexico
      4. Policy and state responsibility
    2. Morphogenetic approach: a tool for analysis and synthesis
    3. Contribution to broader academic debates
      1. Agency, decision-making and displacement dynamics in forced migration
      2. Policy gaps and adverse consequences
      3. State accountability
      4. Synthesising these debates
    4. Final reflections
      1. The evolving situation in Mexico and Central America
      2. Global relevance
      3. Future research directions
    5. Notes
  13. Bibliography
  14. Index

Introduction

Organised criminal groups in Mexico have been involved in people-smuggling and in the abuse of migrants for many years. Alongside this, a displacement crisis has emerged as people with different potential protection needs flee a complex mix of factors in Northern Central America (comprising El Salvador, Guatemala and Honduras). These include violence and threats from criminal gangs, persecution by state actors, gender violence and hate crime, the impact of climate change and natural disasters, and entrenched inequality and poverty. Further, vast numbers of extracontinental migrants and refugees are transiting Mexico en route to the USA. Systematic abuse of and extreme violence against transit migrants – particularly Central Americans – in Mexico have been well documented by organisations and academics over the past two decades, and migrants have become a significant source of income for some criminal organisations.

This book brings together three aspects of organised crime in relation to migration – its role in provoking displacement, the abuse of migrants in transit, and people-smuggling – reflecting on the facilitating power of corruption and impunity. These three links between organised crime and migration have typically been approached as disaggregated phenomena. However, they are deeply interrelated, so a more integrated perspective on these is needed. This is the first study to present detailed analysis of these three phenomena alongside each other, and to link each of these to corruption and impunity, analysing the role and responsibility of the Mexican state in all this.

The study engages a critical realist analytic framework – the morphogenetic approach – to examine how agency and structure interact and transform one another over time and to determine the impact of time-specific events and contextual factors, analysing the process of change to understand direct and indirect causal mechanisms. This framework is employed to analyse how criminal violence in Northern Central America causes internal displacement and forced migration and the mobility dynamics that result, presenting this alongside the involvement of criminal groups during the transit portion of migration. The framework is then used to analyse how the abuse of migrants became a criminal industry in Mexico and to demonstrate how people-smuggling has become an organised crime enterprise that compromises state integrity and further entrenches corruption.

The study provides detailed analysis of the role of states in all this. It demonstrates how an environment of endemic corruption and impunity enables organised crime’s involvement in migration through Mexico and how the implementation of externalised migration policy in this context can have adverse consequences that, rather than being framed as ‘unintended consequences’, should be considered foreseeable. It reflects on state responsibility in the context of such externalised controls, examining how the externalisation of US migration controls to Mexico under Plan Frontera Sur (also known as Programa Frontera Sur) – the Southern Border Plan – conflicted with Mexico’s international obligations towards those with potential international protection needs, increased risk and harm to migrants who became ‘collateral damage’ of this policy, and catalysed the deeper involvement of organised criminal groups in the exploitation of migrants, thus aggravating corruption related to people-smuggling. As a result, this study provides new understanding about the likely foreseeable adverse consequences of implementing policy in areas affected by endemic criminal violence, impunity and corruption, and about the implications for state accountability if states are cognisant of these and develop and implement such policy nonetheless.

This analysis continues to be relevant to the migration dynamics in Mexico and Central America, as well as to those in other jurisdictions where there are mixed migration flows and people-smuggling, or where violent non-state actors contribute to displacement or target displaced people. As such, its conclusions are highly relevant to academics, practitioners and policymakers concerned with such issues, both in the region and globally, and for understanding the potential implications of delivering or externalising policy in other countries affected by corruption or organised crime.

This introductory chapter sets out the context in which this study is located. It first gives an overview of organised crime and human mobility in the region, describing the characteristics and modus operandi of prominent organised criminal groups in Mexico and Northern Central America, and some of the dynamics between them and the state. It then explains this study’s methodology and the employment of the morphogenetic approach to analyse each of the three links between organised crime and migration and bring them together. It sets out the book’s central arguments, its contribution to knowledge of interest to academics and policymakers, and its engagement with relevant academic debates. The chapter ends with an outline of the structure of the book.

Organised crime and human mobility in the region

For many years, Mexico has experienced one of the largest flows of transit migrants in the world, and these migrants experience systematic human rights abuse and violence during their journey. Criminal groups are responsible for endemic criminal violence and persecution that force people to resort to internal displacement or external migration in both Mexico and Northern Central America. Tens of thousands of people flee criminal violence in the region each year. Organised criminal groups in Mexico are involved both in the abuse of transit migrants and in the control of people-smuggling that facilitates migration journeys. The situation is dynamic and evolving, with new activities and state and non-state actors – and state responses to these – constantly emerging.

Thousands of migrants in transit are affected by the violence perpetrated by organised criminal groups every year, yet the Mexican state has failed to deliver any effective response. Large Mexican organised criminal groups also control people-smuggling in the region, either through the collection of dues known as piso or derecho de piso to pass within their territory or through more direct operational involvement. However, the increasing control of territory by organised crime groups has meant that people-smuggling, as well as facilitating unauthorised entry, has become a protection racket in many respects, with people compelled to use such services to protect both against violent criminal actors and from apprehension by state actors.

Tens of thousands of people fled their homes in Northern Central America during the early 2010s when the security situation deteriorated significantly. Without either effective state protection or viable options for internal flight, people resorted to fleeing across international borders. This led to unprecedented increases in associated asylum claims in Mexico and in the number of families and unaccompanied minors from Northern Central America presenting themselves at the US border in 2013 and 2014. In response to this situation – described by President Obama as an “urgent humanitarian situation” (The White House 2014) – Mexico implemented new in-country migration controls in the south of the country under Plan Frontera Sur, effectively externalising US migration controls in order to curb arrivals at the Mexico–US border.

Following the implementation of these controls, people who had fled their country were obliged to move in an increasingly marginalised manner, making them more vulnerable to exploitation and abuse by the organised criminal groups that control the route north. Those with access to financial resources could use regular means of transport or people-smugglers to facilitate their journey, avoid migration controls and access transport, but those with fewer resources were exposed to risks during transit. Regardless of the controls and the risks in transit, the exodus from Northern Central America continued after the implementation of Plan Frontera Sur and, by April 2016, the number of people fleeing criminal violence had reached levels not seen since the region was affected by civil wars, and pervasive violence and persecution by criminal actors had become a principal cause of out-migration.

The nature of organised criminal groups

Criminal organisations of different sizes and natures share some common features and modes of control. Such groups must be understood to have moved beyond just the provision of illicit goods and services to become organisations that seek exclusive control over territory, deal primarily in private protection and operate as non-state, quasi-political authorities (Schelling 1971, Gambetta 1988, 1996, Paoli 2002, 2014). Regardless of size, they establish and maintain their authority due to key features – a strong collective identity coupled with an “extraordinary capability to adapt to changing social and economic conditions” (Paoli 2002: 64) – and operate by usurping critical activities over which the state usually has a monopoly: notably, the use of force and taxation (Paoli 2002, Kleemans 2014). Criminal groups take advantage of state weaknesses to seize territorial control, to co-opt or corrupt state actors and entities to enable their continued operations with impunity, to diversify their portfolios by leveraging emerging criminal markets and to resort to violence to meet their ends, be they criminal or political (Dudley 2016a). Their political aims are generally linked to control rather than ideology. In order to reinforce their control, unhindered operation and criminal governance, they buy or force allegiance from political and state actors.

Violence is endemic within criminal organisations that vie for exclusivity over markets and territories – to punish, to exert power, to reinforce the need for protection and to demonstrate superiority over rival organisations. With no recourse to formal institutions to enforce economic agreements and to remedy violations, violence – or the threat thereof – must be employed instead. While the threat and use of violence may be linked to transactional activity, it is often employed for “contingent reasons” such as unstable and fragmented relationships between different criminal groups, demonstrations of power and authority, or to send messages to rivals (Gambetta 1996, Paoli 2002). Nonetheless, the ‘private enforcement’ activities of criminal organisations do not always run contrarily to the interests of the state, and there is often cooperation – or, at a minimum, coexistence – from state officials, and an acceptance of the activities and roles of these organisations (Gambetta 1996). Indeed, the state is far from a benign actor in this.

There is generally an absence of effective state action against organised crime throughout Latin America, although this is deeply linked to entrenched corruption and impunity. This contrasts with what we would normally expect to see: the state asserting its authority and its monopoly on the use of force (Osorio 2011). In the absence of appropriate and effective state response, organised criminal groups are able to assert authority, establish strong roots and embed themselves as powerful non-state actors (Schelling 1971, Gambetta 1988, 1996, Manwaring 2007, Karstedt 2014). This, in turn, weakens state control, resulting in power vacuums that are then usurped by organised crime entities. This results in pockets of failed state where criminal organisations become stronger as corrupt state agents become involved in criminal activities: “The State is rather an actor in organised crime than its victim” (Karstedt 2014: 317). This situation is particularly acute in Mexico, because corruption and patronage have been integral to politics for several decades, with strong links and cooperation between the government and organised crime in what has been described as a pax narcotica or pax mafiosa (Buscaglia 2015, 2016).

While criminal groups are important social actors in the region, in some parts of Mexico they have become de facto governments or quasi-political authorities that use certain tactics (force, corruption and intervention in political processes) to steer authorities away from policies that are misaligned with their objectives. Sullivan (2012) calls this usurping of state control “criminal insurgency” and describes how some groups promote themselves as “social bandits”, highlighting that their increasingly transnational nature takes them not only beyond law-enforcement issues, but also beyond issues of national security. Manwaring (2007) describes the increasing similarities between the region’s criminal groups and insurgency movements in terms of political motives and political control; control that is gained not by a coup d’état, but by gradual and meticulously planned smaller incursions into territories and institutions. Further to this, “the persuasive and intimidating actions of the gang phenomenon in the electoral processes have pernicious effects on democracy and tend to erode the will and ability of the State to carry out its legitimising functions” (Manwaring 2007: 29).

In Mexico and Central America, the corruption of state authorities goes beyond impunity for criminal actions, to the collaboration of officials, the collusion of security forces and the co-opting of state employees. This is best understood within the conceptualisation of criminal governance (see, for instance, Lessing 2015, 2017, Moncada 2016, 2021, Barnes 2017, Arias 2017, Durán-Martínez 2018, Magaloni et al. 2020, Trejo and Ley 2020, Feldmann and Luna 2022, Uribe et al. 2025), which explains how criminal groups enforce control, particularly in the context of Latin America. This can explain the social and economic power of criminal groups in regions they control and the complex relationships between the state and criminal groups that extend far beyond the dichotomous distinctions normally understood to be between state and criminal actors.

All organised criminal groups “implement at least a very basic system of governance after consolidating territorial control” (Barnes 2017: 973), which comprises territorial control, social control and collaborative relations with state actors. The form of local authority that different types of criminal groups establish varies according to the three variables of “degree of territorial control; relationship with the state; and relationship with the community”, with five key regime typologies (defined as Insurgent, Bandit, Symbiotic, Predatory and Split) that vary most distinctly in their relationship with the state and the extent to which this is marked by confrontations or alliances (Magaloni et al. 2020: 555).

Within territorial control, criminal groups monopolise economic activities and the use of violence, defending their territory from rival groups and against enforcement by state actors (Barnes 2017). Social control is employed to ensure compliance from residents as well as economic benefits from them (for example as dues or extortion) and to support the avoidance of enforcement and defence of territory against rivals (for example, by maintaining rules of silence and loyalty) (Magaloni et al. 2020). Relations with the state must be managed to avoid enforcement and confrontations – that is, managing state actors and keeping the police away to protect criminal activity and income and maintain the criminal group’s authority and territory – and to facilitate certain activities or ensure impunity through alliances with varied levels of cooperation (Magaloni et al. 2020).

The concept of criminal governance does not imply the parallel existence of criminal groups and the state, but rather acknowledges various levels of interaction between them. These can vary between confrontations and alliances, with a continuum between these or a combination of interactions (Magaloni et al. 2020). The complex and varied interactions between criminal and state entities are neither consistent in their manifestation nor diametrically opposed (Arias 2017, Lessing 2020). These may instead operate in parallel or co-existence that can be described as “instances of divided sovereignty or duopolies of violence” (Feldmann and Luna 2022), where there are symbiotic interactions, collaborations and arrangements between them (Moncada 2016, Durán-Martínez 2018, Lessing 2020, Magaloni et al. 2020). Nor are they static, rather “crime–state relations are often fluid, shifting back and forth between these various arrangements over time” (Barnes 2017: 973). Shifts in these patterns – towards confrontation rather than alliances, and vice versa – can provoke or reduce levels of violence (Magaloni et al. 2020).

Rather than providing an effective intervention, state security responses or confrontations can instead generate or aggravate violence, provoke inter-group hostility or battles, and push criminal presence or activity into previously unaffected areas (Calderón et al. 2015, Lessing 2015, 2017, Magaloni et al. 2017, 2020, Durán-Martínez 2015, Trejo and Ley 2020). The outcome will differ depending on the nature of the group and its criminal governance which “vary according to whether criminal groups confront or collude with state actors; abuse or cooperate with the community; and hold a monopoly or contest territory with rival OCGs” (Magaloni et al. 2020: 555).

Organised criminal groups in Mexico

Large, family-based organised crime groups have been active in Mexico for several decades, and their operations have been supported by endemic corruption, with Mexico’s government and elites cooperating with and benefiting from organised crime. (For detailed analysis of the post-2000 development of and distinction between groups, see, for instance, Medel and Thoumi 2014, Calderón et al. 2015, Trejo and Ley 2020, Magaloni et al. 2017.) Since the 1990s, the form, nature and business models of criminal organisations in Mexico have evolved and reshaped, and their activities and income sources have diversified. Significant changes followed the end of authoritarian rule and the defeat of the PRI (Partido Revolucionario Institucional) in the 2000 presidential elections, with the associated loss of patronage protection from the state and security forces, and then after the 2006 crackdown on organised crime and its strategy to remove the heads of large criminal groups (Dudley 2012, 2016a, Calderón et al. 2015, Medel and Thoumi 2014, Trejo and Ley 2020).

The key transformations that emerged after the changes in 2000 and 2006 were: the fragmentation of existing groups into smaller groups who then formed allegiances or battled over territorial and trade controls; the recruitment of militias with military experience; and a substantial increase in violence, fuelled in part by a flood of heavy weaponry from the USA following the 2004 expiration of a ban on assault weapons. As these new groups emerged and the strategy of territorial control hardened, the groups diversified into other activities, including, ultimately, the kidnap and extortion of transit migrants. The conceptualisation of criminal governance provides framing to enable us to understand the territorial control model, the shift in operations and the ongoing, shifting and complex connections with state actors. It thus explains how groups hardened territorial control in the post-authoritarian context, the rise of private militia to enforce control, protect from confrontations with the state or battle rival groups, and the ongoing territorial control and operationality of groups in the country and beyond (Trejo and Ley 2020).

The US-backed Mexican government crackdown on organised crime from 2006 (commonly referred to as the ‘War on Drugs’ or the ‘Kingpin Strategy’) focused on the ‘decapitation’ of cartels through the capture or killing of their leaders. However, this approach appears to have had a ‘hydra’ effect, with battles for leadership causing division and two or more heads growing in the place of the one that had been removed. Groups fragmented to form new groups, strengthened their paramilitary wings and battled over territory, financial activities and smuggling routes, causing significant increases in violence and homicides. This led to incursions into new criminal markets to increase incomes with the “paradoxical result that the strongest cartels […] consolidated their power” (Stillman 2015). During this time, and as a result of both internal developments and fragmentation within large criminal groups (such as the Gulf Cartel, Sinaloa Cartel and La Familia Michoacana) and the attempts to break them up, smaller groups (such as the Zetas, Knights Templar and Cártel Jalisco Nueva Generación) emerged that were focused on controlling territory. These groups were much more involved in extreme violence, extortion and charging piso.1 These major criminal groups – often referred to as cartels – now had extraordinary firepower and sphere of influence and could perhaps best be described as “paramilitary organised crime networks” that operate in parallel to the state (Grillo 2023). Within some parts of Mexico, these groups cause a significant amount of internal displacement and external flight.

This period correlates with the involvement of criminal groups in the systematic abuse of transit migrants in Mexico (Dudley 2012, 2016a, Dudley and Rios 2013, Guerrero 2011, Rodríguez 2014). This happened in the context of post-2001 migration policy and the militarisation of the US–Mexico border, intensified in the post-2006 context, and further hardened following the implementation of in-country migration control in 2014 under Plan Frontera Sur (Hiemstra 2019, Basok et al. 2015). Most recently, large organised groups – notably the Sinaloa Cartel and the now large and powerful Cártel Jalisco Nueva Generación – became directly involved in people-smuggling operations, battling each other for control of areas near Mexico’s southern border with Guatemala or exerting their dominance at the US–Mexico border. Below this top level of large criminal groups, there are three discrete operating models – as described by experts in my fieldwork – by which smaller groups engage in criminal activity (including the abuse of migrants) within their territory, and these are intrinsically connected to the new model of territorial control. Firstly, there are franchise models consisting of smaller local groups operating independently but using organised crime ‘brand names’. Secondly, organised crime groups grant concessions to local criminal groups, permitting them to undertake specific activities within their territorial control, such as assaults and kidnappings of migrants. Thirdly, some groups are subcontracted to carry out certain tasks on behalf of organised crime, such as collecting piso on the trains. These different operating models indicate varying levels of involvement in the abuse of migrants by large criminal groups, but they all serve as revenue streams to organised crime.

Organised criminal groups in Northern Central America

The criminal landscape in Northern Central America is markedly different from that in Mexico. These countries have suffered from endemic violence and citizen insecurity, the highest murder rates in the world and, by the early 2010s, were acknowledged as the deadliest countries outside of declared war zones (Cantor 2016).2 Dudley (2011) describes three key types of organised crime groups that were operating in the region: street gangs, transportistas (local drug-trafficking groups) and Mexican cartels. This differentiation is critical to understanding each group’s activities and use of violence and the ensuing impact this has on displacement (Cantor 2014), with most appearing to be provoked by violence perpetrated at local level by street gangs that is directly linked to their criminal governance.

There were two extremely powerful and significant street gangs, or maras, in Northern Central America (Mara Salvatrucha or MS-13 and Barrio-18 or B-18 – although these have each split into two other main entities in both El Salvador and Honduras) that originated in exile in California during the region’s civil wars. There are also many smaller street gangs, especially in Honduras. These maras were able to develop because of specific social conditions in these countries – including a weak rule of law, economic inequality and social marginalisation – although their more recent strengthening and increased violence is linked both to these ongoing conditions and to their involvement in international drug trafficking (Dudley 2011, Pérez 2013, International Crisis Group 2016).

Maras are social and criminal organisations that have dominated hundreds of neighbourhoods and towns in the region, with de facto control of some parts of the country – especially marginalised urban areas – where they have become more powerful than the state. They exert societal power in their territory and have spheres of influence throughout the country, as a result of entrenched corruption and their surveillance and communication networks. Within gang-controlled areas, maras effectively govern as “a shadow government, implementing its own laws, rules and taxes” (Martínez d’Aubuisson 2022). As such, the concept of criminal governance explains their establishment of territorial control and imposition of social control in marginalised areas with weak state presence, and the associated violence that derives from this. Such violence is employed to defend territory from other criminal actors and state forces and to maintain territorial control.

Violence and the implicit and explicit threat of this is employed to maintain social control over the population of the territory. A mara views itself “not as just controlling the territory, but also as controlling the people who live there, subjecting the inhabitants to its rules and control” (Weir 2022), using violence and threats to enforce these. This social control imposes requirements for loyalty, obedience and respect for their local authority. Loyalty is demanded to protect from enforcement, with codes of silence (ver, oír y caller or ‘see, hear and be silent’) that punish acts such as making a police report or collaborating with the authorities. Obedience is demanded to maintain the integrity of the territory as well as to meet the gangs’ economic and other wants and needs. People are obliged to comply with all gang demands (whether for extortion payments or ‘tax’, collaboration in criminal activities or to leave the area), and refusal to do so is considered an affront to gang authority that is punishable with extreme violence.

Corruption and impunity are key to the existence, operations and criminal activity of all groups, from maras to transportistas, and the region is marked by entrenched corruption at all levels of governance and authority. Organised criminal groups pursue corruption as a core part of their strategy to manage state relations and ensure their survival and, as a result, have infiltrated state security institutions – police, military and judicial systems – throughout the region. Some members of the security forces and political actors engage in criminal activity or collaborate with organised crime. This situation is fluid rather than constant, however, and the state–gang relationship can change from alliances to confrontations that provoke violent responses from gangs. Security forces’ raids or confrontations in gang territory and the breaking of state–gang truces result in violence (Magaloni et al. 2020) that provokes displacement as residents flee rising levels of violence or the risk of being targeted by state forces. Various repressive crackdowns against maras (known as mano dura or ‘hard fist’ approaches) have been employed, although these tended to result in increased violence (for example, in El Salvador in the mid-2000s) and failed to address the root causes of the violence and criminal gangs’ control.

Maras gained increasing political influence, particularly in El Salvador and Honduras. They have connections with the country’s political and economic elite and have gained influence over some authorities, through infiltration and corruption. They may influence political outcomes, and MS-13 in particular has now moved beyond selling votes and controlling access for political campaigns to direct political action and “involvement in partisan party politics” (Farah and Babineau 2018: 12). While the political influence of the maras was strong in both countries, this trend became “most visible in Honduras, where it is combined with a much more coherent, identifiable political ideology and messaging” (Farah and Babineau 2018: 12). Drug-trafficking groups also have political interests and can purportedly influence subnational decisions. This reached new levels in Honduras through the 2010s, culminating in the former president Juan Orlando Hernández being extradited to the USA and convicted for drug trafficking and collusion with organised crime. An attorney general, security ministers, senior police and close relatives of previous presidents have also previously been convicted of drug trafficking and money laundering.

Methodology and approach

The book examines changes that relate to the implementation of Plan Frontera Sur between 2014 and the end of 2016. These are located within the context of changes in Mexico that transformed the presence, nature and activities of large organised crime groups: political changes around the end of single-party rule in 2000 and the end of extant patronage between the state and organised crime groups; the hardening of US migration controls and militarisation of the US–Mexico border from 2001; and Mexico’s security policy and attempted crackdown on organised crime from 2006 that led to the evolution of organised crime and its modus operandi. This all plays out in the context of a deepening displacement crisis in the region from 2013, as tens of thousands of people fled gang violence in Northern Central America. The analysis of contemporaneous events and statistics continues until the end of 2016, when a new US administration (the first Trump administration) came to power and immediately launched new policies in addition to ongoing activities under Plan Frontera Sur, significantly changing the context. My rationale in doing this was to enable an unobstructed analysis of the impact of this specific policy, without the impact of other policies confusing this. Subsequent policies have had similar impacts on the empirical situation of migration in Mexico and the involvement of organised crime groups in the exploitation of migrants (see Dudley et al. 2023), and these are reflected on in the final chapter of this book.

I took a primarily qualitative approach to my research to generate new data about this emerging situation. I undertook fieldwork in Mexico and El Salvador between September and November 2015, where I conducted interviews with experts, migrants and asylum-seekers. The data gathered in this fieldwork was triangulated with contemporaneous reports and supplemented with analysis of legal frameworks and official data. Analysis of data was done using the morphogenetic approach. This is the first use of this approach in such a study and was therefore experimental at the outset. To deepen understanding about internal displacement, Chapter 1 additionally relies on broad findings from further research and five more fieldwork trips to the region that I conducted between 2018 and 2023, and includes analysis from the perspective of criminal governance, a theory that developed over this time. My research included semi-structured interviews with almost 200 experts (government officials, heads of international organisations, community leaders and representatives of international and local non-governmental organisations (NGOs)) in Mexico, Honduras and El Salvador, as well as formal and informal individual interviews and focus groups with people and communities affected by displacement in Honduras and at refugee camps in Mexico.

Fieldwork in Mexico and El Salvador, 2015

In late 2015, I conducted structured and semi-structured interviews with fifty-eight migrants and thirty-four experts on migration and organised crime in the region, including academics, government officials and representatives of international agencies in Mexico City, Tapachula and Ixtepec in Mexico and in San Salvador and Santa Tecla in El Salvador. I spent three weeks at the Albergue ‘Hermanos en el Camino’ migrant shelter in Ixtepec, southern Mexico (the Albergue) and two days at the reception centre for Salvadorans deported overland from Mexico in Santa Tecla, El Salvador (Centro de Atención a Repatriados, the Returns Centre), where I conducted interviews with staff and migrants.3

I lived at the Albergue during my research there, enabling me to make further ethnographic observations about dynamics and incidents. I conducted fifty formal interviews with migrants during my stay, which amounted to a quarter of the people staying there, using stratified sampling to reflect the demographic composition of the full population. Of the sample I interviewed, there were forty-two men, five women, one trans woman, one accompanied minor and one unaccompanied minor. These included the heads of five family groups, three of which were mothers with young children under the age of five and two were the fathers of teenage boys. The majority of the people I interviewed came from Honduras (twenty-one), El Salvador (seventeen) and Guatemala (eight). Of the remaining people, two came from Nicaragua, one from Cuba and one from Mexico. I also conducted eight interviews with Salvadorans who had been deported from Mexico at the Returns Centre in Santa Tecla, employing convenience sampling due to time constraints.

The people I interviewed had not used the services of people-smugglers to travel and, in general, had little experience of such services due to financial constraints. The majority of them had walked the whole of or a large part of the route, often following the train tracks and making diversions to avoid migration checkpoints within Mexico. Many of them had also used combis (microbuses) within Mexico, some had used public buses and taxis, while a few had ridden on top of trains. Of my sample at the Albergue, twenty-seven people gave reasons for leaving their country that could indicate potential international protection needs under the regional definition provided for in Mexican law. Eight of these were claiming or intended to claim asylum in Mexico.4

These research sites presented me with systematic biases in my research sample, because I was not able to access people who were using the services of people-smugglers or those who were able to travel in an authorised or regular manner. The people I interviewed at the Albergue were some of the most marginalised people travelling overland through Mexico – those who did not have the resources to use people-smugglers to facilitate their journey or to access authorised travel and regular entry options. Just two interviewees (one at the Albergue and one at the Returns Centre) told me that they had engaged such services for all or part of their journey, although there were other people arriving at the Returns Centre who appeared to have used people-smugglers (they were well dressed with suitcases). As a result, my analysis of people’s decision-making excludes those who were able to leave in a more planned manner, after considering all their options and arranging travel in advance (either using authorised travel options or people-smuggling services), perhaps when at a lower level of risk.5

Ethical considerations

My field research presented methodological challenges and significant ethical concerns, which were fully evaluated, and my strategy to mitigate risk was approved by the University of London Research Ethics Committee. My primary ethical responsibility was to respect the safety, wellbeing and confidentiality of all research participants. Considerations about vulnerability, marginalisation and privacy informed all stages of my preparation, including research design, selection of research locations and the planning and implementation of my fieldwork trip. Additionally, the vulnerability of displaced people and the compromised security situation posed by insecurity and organised crime raised some points of concern, namely: the general presence of organised crime and poor security in the region, high levels of corruption and infiltration of state institutions by organised crime actors, and the potential infiltration of migrant shelters by members of criminal groups.

Firstly, my interview design and technique were informed by practical concerns, such as ensuring the physical and psychosocial wellbeing of research participants who may be tired, hungry or mentally distressed, in particular when relating traumatic stories. I took particular care to be sensitive to participants’ emotional wellbeing and not to elicit information that could identify the participant or their family members or that could compromise their anonymity. Secondly, I was conscious of the risk of exposing participants to members of criminal organisations possibly operating in the vicinity of research sites, or who might have infiltrated the migrant shelter, and of the possibility of inadvertently interviewing either criminals posing as migrants or migrants recruited by gangs during transit. I took steps to mitigate this, to act with caution in regard to the nature of all discussions and, above all, to maintain the confidentiality of other research participants. I carefully designed my interview questionnaire to be as neutral as possible, so that any potential exposure would not jeopardise participants, investigators or the research project itself. Furthermore, I did not discuss with anyone who was not a trusted contact the focus of my work on organised crime or enter into conversations that could expose either me or my research participants to security risks.

Data analysis

Analysis of my data was an inductive process, allowing me to explore the sources in an unbiased manner and in increasingly granular detail, extracting narrative elements to give nuance and insight to the patterns I observed. Legal frameworks and publicly available quantitative data on apprehensions and deportations from US and Mexican government agencies were also analysed and interpreted within the context of narrative accounts from experts’ interviews. For my examination of past events, I applied new analysis to previously published work and narrative accounts from my interviews, in order to enhance understanding about the processes of change over time and the causal mechanisms involved.

The morphogenetic approach: a critical realist analytic framework

To look at the evolving situation from the perspectives of both structure and agency, examine how agency and structure interact, reshape and transform one another over time, and analyse the process of change to reveal the causal mechanisms of change, I used the morphogenetic approach (Archer 1982, 1995, 1996, 2011, 2013, 2020, 2024, Archer et al. 1998) – a critical realist analytic framework. This responds to Bakewell’s (2010) call for a critical realist approach to migration studies to help resolve the structure–agency impasse, such as Archer’s (1982, 1995, 1996) morphogenetic theory. Bakewell considered that this might provide a theoretical approach that could analyse both structure and agency and their interactions, map out changes, elaborations and causal mechanisms over time, and encompass the internal and external dimensions of migration and “both forced and voluntary migration in a more comprehensive way” (Bakewell 2010: 1708).

Commentators on organised crime have indicated the value of a critical realist approach that evaluates the dynamic and interactive nature of agency and structure “to look beneath the surface” and identify the causal processes that produce change (Matthews 2014: 29). Indeed, Medel and Thoumi (2014) show how the development of organised crime in Mexico has followed a morphogenetic pattern, with synchronic elements leading to the structural elaboration of criminal groups. This makes it a pertinent lens with which to analyse the evolving dynamics of the three aspects that link organised crime and migration, as well as the dynamic nature of migration journeys and the decision-making that shapes them. This is the first time morphogenetic analysis has been applied in an extensive study on migration and associated issues. Its successful application in this study, while not exhaustive, demonstrates how such critical realist approaches can be used to simultaneously analyse aspects of structure and agency and to reveal complex causal effects and interactions over time and in relation to synchronic events, such as policy implementations. As such, it opens the way for more deeply structured and comprehensive application in future studies.

THE STRUCTURE–AGENCY IMPASSE

The structure–agency impasse has its roots in the development of modern migration theories. These theories tend to have diverged between structure or agency, resulting in dilemmas about how to accommodate structure and agency in migration theory in a comprehensive way and in ongoing difficulties in trying to reconcile these elements to better explain the contemporary reality of migration. The ‘manifold’ motives for migration are not handled well by separate theories for different categories of migrants, nor is it necessarily useful to separate theories of internal and international migration, as there can be links and convergences between these (Van Hear 1998, Massey et al. 2008, Castles et al. 2014). As a result, there is a “need to connect theories focusing on agency and identities of migrant and the continuation of migration with macro-level theories on the structural causes of migration” (Castles et al. 2014: 46).

Reconciling this interplay between agency and structure within theory has proven to be challenging. Consequently, “theories of migration have tended to skirt around the problem of structure and agency” (Bakewell 2010: 1670), putting too much focus on one, rather than accepting the inherent dualism and their interrelation as dynamic forces of change. The recursive relationship between them is not as straightforward as one where agency is constrained or expanded by structural factors, because some structures are formed and altered by the agency and actions of individuals. While making progress to accommodate agency with structure, structuration theory (Giddens 1979, 1984) fails to consider sufficiently the contextual factors that enable or constrain agency or individual preference in decision-making (Stones 2005) or to “take account of the temporal disjuncture, when the activity of a social actor today contributes towards the future form of social structures, which will shape the context for social actors in the future” (Bakewell 2010: 1696). Some of this complexity can be found in the impact of policy implementation, “which can sometimes have unpredicted results, of either a positive or negative kind” (Richmond 1993: 9).

MIXED FLOWS AND TRANSIT MIGRATION

The structure–agency impasse could be at the crux of the dilemma over whether general migration theory can also encompass forced migration. Zetter et al. (2013) note that “micro-level focus on the agency–structure nexus” generates better understanding about mobility and displacement in conflict situations, by looking beneath the surface of mobility that ostensibly “seems both random and spontaneous” (Zetter et al. 2013: 224). Indeed, structural approaches better suit the “governance of international migration [that] is shaped by the conceptual distinction between ‘voluntary’ and ‘forced’ migration as mutually exclusive categories. In reality, of course, the distinction is far from clear-cut” (Van Hear et al. 2009: 1).

Distinctions between forced and voluntary migration, and a growing acceptance of the blurred lines between them, are at the heart of dilemmas in addressing transit migration, which is increasingly defined by mixed flows with varying levels of potential international protection needs. This raises issues around “the inherent problems involved in conventional policy categories of ‘types’ of migration” (Collyer et al. 2010: 5) and the inability of categorisation and dichotomous approaches to address the complex motivations of the mixed flows in transit migration. This is reflected in dichotomous approaches to the situation in Mexico taken by regional commentators. Some adopt a structural approach, focusing on interstate relations and evaluating the impact of border control and securitisation, restrictive migration policy and the externalisation of migration policy (Castillo Garcia 2000, 2006, 2010, Velasco 2009, Alba 2010, Ángeles Cruz 2010, Casillas 2011, Verduzco and De Lazano 2011, Ceriani Cernadas 2013). Others take a migrant-centric approach, analysing the mixed motives for migration and the agency and strategies of people during transit (Gaborit et al. 2014, Marroquín Parducci 2015, Hernández 2015). A structure–agency approach to transit can therefore “reposition the analysis of modern non-linear, irregular migration in a framework that enables the researcher to identify the continuous interaction between the structural components and the individual agency” (Dimitriadi 2016: 44) and better accommodate the mixed nature of transit flows.

Applying the morphogenetic approach in my data analysis

I apply morphogenetic analysis to my data to generate understanding about how and why this situation evolved and continues to elaborate and to reveal the direct and indirect causal mechanisms of change over time. This advances understanding about why people flee criminal violence, how the involvement of organised crime in migration has evolved, and the nature and impact of state action. The key elements in each of my analyses are structure, agency, contextual factors – that is, structural elements and social factors – and time-specific (or synchronic) events, such as the implementation of a policy or a violent criminal incident. The morphogenetic approach is used to identify the causal role of such events given the contextual factors, thus also revealing any causal role of the contextual factors themselves. The nature and source of all these factors, however, is important when reflecting on accountability for adverse consequences of policy or on how to disrupt the processes that result in them.

I analyse changes to both organised crime and state factors as structural elements within this framework, because they are both structural factors on migratory transit through Mexico. Organised crime structures display highly emergent properties, being able to adapt and evolve in a much more dynamic manner than state structures can because they are free of both bureaucracy and adherence to law and legal norms. Simultaneously, the morphogenetic framework enables better understanding of migrant agency and of the agentic properties of the state. Examining migrant agency without either differentiating between or conflating forced and voluntary migrants at the point of analysis enables a more coherent picture of how agency responds to opportunities and obstacles presented by synchronic events and contextual factors. Even when options are extremely limited, agency is exercised within the constraints of such obstacles and opportunities, rather than being limited itself. This approach enables us to see how agency shapes and reshapes the migration trajectory: why and when people move, where they decide to move to and the factors that shape their decisions along the way. Attention is also paid to the emergent and transforming properties of migrant agency, to bring new understanding about how it contributes to structural elaborations.

Analysis within this framework allows findings and conclusions to be drawn into broader debates and theories on migration, presenting the deep involvement of organised crime in transit migration in Mexico and Central America as adverse yet foreseeable consequences of government policy – consequences that pose serious risks to human rights. For instance, analysis of the causal mechanisms of structural changes exposes how policy provided fertile ground for the development of systematic criminal violence during migratory transit, how this resulted in people-smuggling becoming a protection racket to protect against attacks, how restrictive migration controls were implemented in response to successful people-smugglers transporting some of the tens of thousands of people fleeing criminal violence to the US border, and how people-smuggling operations responded following this policy event.

Without such an approach, it is difficult to understand how factors such as migrant agency, migration controls and government policy have influenced these developments, whether there were specific causal mechanisms, and how these phenomena fit into the broader debate about the unintended consequences of migration controls. In particular, the approach enables better understanding of how macro-level decision-making influences the micro-level actions and strategies of the different parties. Such analysis is critical in order to identify and understand any indirect or direct state responsibility for the situation and any implications for the delivery of policy in areas affected by criminality and impunity. In addition, the book explores the potential of morphogenetic analysis as a model for understanding and foreseeing the likely adverse consequences of policy when implemented in a toxic environment of systemic corruption, endemic criminal violence and impunity.

Engagement and contribution

The book makes three original contributions to the existing body of knowledge that will be interest to both the academic community and to international and national policymakers and practitioners. Firstly, it develops knowledge and understanding about the ongoing situation of human mobility in Mexico and Northern Central America, and of organised crime and migration more broadly. Secondly, it uses a critical realist analytical framework to evaluate agency and structure simultaneously, addressing theorists’ concerns about the troublesome relationship between agency and structure in migration theory, and providing causal explanations of change. Thirdly, it connects with three lines of academic debate, bringing together strands on agency and decision-making in mixed migration, policy gaps and adverse outcomes, and state accountability. As such, it contributes to broader debates on migration and on theories of migration, as well as advancing understanding about organised crime and human mobility.

Firstly, it addresses a contemporary issue, contributing knowledge and analytical depth about the ongoing situation and dynamics shaping internal displacement and external migration and organised crime in Mexico and Northern Central America. Three key aspects of organised crime are examined: as a driver of external migration, as a threat to migrants in transit, and as a facilitator of unauthorised migration through people-smuggling. Rather than examining these as three independent and disaggregated phenomena, it takes an integrated perspective on the links between organised crime and migration, allowing for a rich picture of the situation to be presented. This builds on region-specific substantive knowledge but also has relevance for other situations globally that are affected by some of these issues.

It further deepens understanding about the emerging issue of displacement caused by organised crime, framing this within the concept of criminal governance. By examining the precarity and seemingly random movements of internal displacement and the precise reasons people are forced to abandon their countries because of criminal violence, it connects decisions about initial mobility with those taken in transit and the broader migration continuum. It analyses decision-making in Mexico, where people may decide to stay as their final destination or as a temporary hiatus in their ongoing journey – adding detail about how people navigate risks during transit and opportunities for protection. The research sites were chosen in order to capture the experiences of migrants while living in this liminal space: Mexico may not have been originally considered as a destination for many people, but rather as a transit place to another destination – namely the USA. The book contributes insights into their decision-making processes and experiences while in Mexico, and builds on current understandings about this liminal space, how decisions are made during transit, and connects these with the factors that drove initial mobility.

Secondly, it responds to Bakewell’s (2010) call for simultaneous analysis of agency and structure in the study of migration, making novel use of Archer’s morphogenetic approach to bring together macro-level theories (structural change, policy) and micro-level theories (agency, decision-making). In doing so, it provides original analysis that explains the evolution of organised crime’s involvement in migration-related activities, exposing the causal mechanisms and policies that led to this. It also brings new understanding to decision-making and the exercise of agency in relation to structural constraints throughout the migration continuum.

Morphogenetic analysis generates causal explanations about the situation and reveals the dimensions of the role and responsibilities of the Mexican state through evaluation of the structural elaboration of organised criminal activities in relation to migration, as well as of state and policy developments. It adds depth to understanding of system feedback by looking at how these elements interrelate with each other, the role of agency and the impact of contextual factors. It also brings new understanding about the adverse consequences of migration controls and their potentially foreseeable nature. I extend this latter line of debate, by looking at the consequences of non-migratory policy, impunity and corruption for organised crime’s involvement in migration, as well as those of migration controls. The book also looks beyond the involvement of organised crime as a primary consequence of such policy, by examining the subsequent weakening of state institutions through corruption as a secondary consequence.

Thirdly, it contributes to broader debates within existing scholarship that concern agency and decision-making in mixed migration, the adverse outcomes of policy, and state responsibility. It pulls together arguments about agency in diverse theories on migration (acute–anticipatory kinetic model, proactive–reactive continuum and transit migration) to show how, in all situations, agency responds to the obstacles and opportunities with differing degrees of urgency to shape the trajectory throughout the migration continuum. In bringing these strands together, it presents a coherent framework for studying mixed migration, and for evaluating initial mobility and the transit portion of migration together as part of a broader continuum.

This book addresses some of the ongoing difficulties in accommodating mixed migration by putting migrants’ decision-making and agency central to analysis at key points. As well as addressing the agency of forced and voluntary migrants within the same framework of analysis, all points on the migration trajectory – from initial mobility to the transit portion – are analysed within the same framework. This allows for equal analysis of decisions made by people at different points of the proactive–reactive continuum, taken with varying degrees of urgency and made throughout the migration journey. It also allows internal displacement to be viewed as part of the broader migration trajectory, rather than seen as separate from external migration, enabling it to be considered as the first stage of transit, if and when internal displacement fails as a protection strategy. This approach enables a better understanding of this decision-making and agency within the broader social context of migration in the region and within the context of various structural factors – from a lack of state protection in the country of origin, to the threat of organised crime during transit, to migration controls that aim to prevent migrants’ agency from being exercised.

Following insight gained from analysis employing the morphogenetic framework, the book argues that policies intended to curb migration and disrupt organised crime have instead strengthened criminal groups, deepened their involvement in migration-related activities and weakened Mexican state institutions through corruption, leading to further manifestations of violence and a worsened situation of human rights during migratory transit. It argues that when criminal violence is a key push factor for mobility, neither these risks nor increased migratory controls significantly constrain the agency of those who need to flee, and traditional pull factors serve more to define the destination than to influence any decision to migrate. As well as providing new understanding about the consequences of implementing policy in areas affected by endemic violence, impunity and corruption, it examines how the externalisation of US migration controls to Mexico conflicts with international obligations towards those who have fled violence and persecution. It then reflects on state responsibility in the context of externalised controls, endemic exploitation and abuse of migrants by criminal groups.

The structure of the book

Throughout this book, the arguments build on each other and are synthesised as it progresses, moving from people’s lived experience of displacement, through the involvement of organised criminal groups in exploiting migrants in Mexico, to the role and responsibilities of the state in all this.

Chapter 1 advances current understanding about the internal and external dimensions of migration driven by violence and persecution by criminal groups, generating new insight about agency and decision-making in situations of forced migration, and how this shapes initial mobility and internal or external flight. It explains the impact that organised crime and criminal violence in Northern Central America is having on internal displacement and external migration, presenting an analysis of the seemingly random movements and precariousness of internal displacement and of why people decide to flee their country. It seeks to determine the impact of violent incidents and of risk levels on people’s decisions to take external rather than internal flight and to reveal the shared logic behind ostensibly random movements. This analysis provides new understanding about how events have different impacts on people who have been victims of crime and persecution, those fleeing a lower level or immediacy of risk, and those moving because of general violence or economic reasons linked to crime.

Chapter 2 explores how people evaluate risks of violence during transit and weigh up opportunities for protection they encounter. It looks at how migrant agency is affected by prior awareness of risk, and how people consider risk from criminal and state actors when they leave their country and during transit, and by the actual manifestation of violence during transit. It analyses decision-making following a criminal attack during transit, when people may encounter unexpected opportunities to regularise their migratory status. Analysis of this decision-making is framed as part of the broader migration continuum, where decisions affect the trajectory from initial mobility and throughout transit. It then looks at how the receipt of information about the right to seek asylum may lead to people changing their intended destination and remaining in Mexico. It analyses how people make decisions and how they balance new information and opportunities with pull factors such as social capital, arguing that when criminal violence is a push factor for mobility, pull factors serve more to define the destination than to actually drive migration.

Chapter 3 examines the threat from organised crime to migrants in Mexico. It explores how this has developed into a structural factor during transit, and the roles migration controls and other non-migration-related policies have played in this development. This analysis provides greater understanding of how the presence, activities and threats of organised crime during transit changed as a result of increased migration controls and non-migratory government policies and how specific policy events in 2006 and 2014 shaped this change. It argues that, although an increased threat from organised crime is a foreseeable adverse consequence of restrictive migration controls in the region, government policies that were not connected to migration have had significant causal effects on this development. It also demonstrates how increasing migration controls in a context where direct violence against migrants is widely tolerated can lead to new manifestations of such violence. This brings new insight into the impact of delivering both migration policy and policy unrelated to migration in an environment of endemic criminal violence, corruption and impunity.

Chapter 4 looks at the evolution of organised crime’s involvement with people-smuggling in the region. It builds on debates on the impact of migration control on people-smuggling and on debates about the unintended consequences of migration policy. It extends these debates by evaluating the role of corruption in facilitating this, showing how people-smuggling became an organised crime protection racket that compromises state integrity and further entrenches corruption. The first part demonstrates how the nature and operations of people-smugglers respond agilely to the imposition of migration controls, and how organised crime strengthens its involvement in people-smuggling, while corruption related to this weakens state integrity. The second part examines aspects of agency, looking at its transforming role in policy response and how migrants and people-smuggling operations subsequently responded, albeit within these constraints. It argues that the externalisation of migration controls can have adverse consequences on people-smuggling operations, which include increased corruption and a corresponding weakening of state integrity.

Chapter 5 develops new insight into the role of policy and the responsibility of the state in these three aspects of organised crime involvement with migration in Mexico. It is pivotal to the book, tying together the individual findings from each of the previous chapters to evaluate policy and state responses, obligations under international human rights law, and the empirical situation in practice, looking in particular at the adverse consequences of policy. It analyses the part played by Mexico in the externalisation of US migration controls, and how their implementation sits alongside the state’s international obligations to those who have been forced to flee criminal violence in Northern Central America. It argues that the adverse consequences of externalised migration controls are entirely foreseeable within the environment of systemic corruption, endemic criminal violence and impunity, and that harm to migrants during transit is ‘collateral damage’ in the drive to externalise border control. It then examines the causal role of state inaction and impunity in the widespread and systematic abuse of migrants by organised criminal groups and analyses state accountability for the implementation of policy despite its foreseeable consequences. Finally, it explains some implications of these findings for notions of state accountability.

The conclusions and reflections chapter is divided into four parts. The first part discusses the new knowledge and understanding that my research brings about the ongoing situation in Mexico and Central America, and about the links between organised crime and migration more broadly. The second part reflects on the usefulness of the morphogenetic approach as an analytic tool, as well as its potential use in the future development of theory and multidisciplinary approaches to migration research. The third part pulls the threads of debate together, evaluating the contribution that this book makes to broader academic scholarship and understanding. Finally, it offers some reflections on the findings’ importance and relevance for the evolving situation and ongoing challenges in the region and for other global contexts.

Notes

  1. 1.  Acts of extreme violence (such as decapitation, massacres and the public display of corpses) are typically used to demonstrate power and authority, or to act as threats and deterrents to third parties, such as rival organisations and political authorities. This type of contingent or symbolic violence is distinct from transactional violence that is used in the carrying out of their economic activities.

  2. 2.  Throughout, this study refers to the situation in El Salvador prior to 2022. It has changed dramatically since that time.

  3. 3.  I use the term ‘migrant shelters’ (Spanish term albergue), even though by the mid-2010s, many of these hosted almost exclusively people who were applying for asylum or a humanitarian visa in Mexico and referred to themselves as ‘refugee camps’ due to their changed role. These shelters run along the key migratory routes through Mexico, and were originally places where migrants could receive free accommodation, food and medical care for a few hours or days, access advice and report human rights abuses. They were established by civil society and religious groups, and tend to operate as a loose chain, sharing information between them, collaborating on recording and reporting human rights abuses, and submitting joint complaints of abuse to the authorities.

  4. 4.  Ley sobre Refugiados, Protección Complementaria y Asilo Político (Law on Refugees, Complementary Protection and Political Asylum), 2011.

  5. 5.  See Van Hear (2004) for how access to resources shapes mobility and defines the options for migration, with a “hierarchy of destinations that can be reached by migrants and asylum seekers, according to the resources – financial and network-based – that they can call upon” (Van Hear 2004:3). Dependent on access to such resources and social capital, decision-making may also be different, with people choosing, for instance, to take anticipatory flight at a lower level of risk, or choosing to remove those who are more vulnerable to risk in a more planned manner, whereas “[o]thers have to settle for less attractive and less secure forms of migration and destinations, notably internal displacement” (Van Hear 2004: 28).

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