This article introduces the Special Issue ‘South–South Security Cooperation and the (Re)making of Global Security Governance’. The contributions explore security-driven South–South interactions across the globe, assessing empirical, theoretical, and normative aspects. Our aim is to decentre debates on global security governance, traditionally focused on Northern-led cooperation, and to move beyond simplistic and simplifying assessments of South–South engagements. The Special Issue particularly highlights the ambiguities of South–South security cooperation, including varying degrees of global North involvement and differing interpretations of ‘security’ and ‘South–South’ among the involved actors. The contributions examine the practical outlook, normative consequences, and embeddedness of these cooperations within global hierarchies, and their implications for global security governance. This article sets the stage for this endeavor. Unpacking the categories ‘South’, ‘security’, and ‘cooperation’, we first provide a working definition of South–South security cooperation. Next, we offer a historical perspective, emphasising the role of legacy effects, institutional structures, geopolitical junctures, and international hierarchies in shaping South–South security cooperation. The concluding section presents the contributions to the special issue and discusses the implications of South–South security cooperation for understanding contemporary changes in global security governance.

This article analyses Colombian South–South security cooperation. Drawing upon empirical research findings and by focusing on Colombian security engagements with other Latin American countries in the realm of military transformation, we identify the role of epistemological constructs as key drivers of Colombian South–South security cooperation. We demonstrate that Colombian policy and security actors intentionally created comparability between their own country and its security challenges, and the conditions existing in other countries of the region. This portrayal of idiosyncratic (in)security features as shared attributes across otherwise-different country contexts enables the transfer of security models rooted in Colombia’s expertise and experience. We show how such security-driven homologisation efforts enabled Colombian security practitioners to navigate international hierarchies, particularly unequal US–Colombian relations in their favour, allowing them to secure continued US support and position Colombian security expertise as a blueprint for addressing contemporary security challenges across the region and beyond.

This paper argues that security cooperation among neighbouring countries in the Global South is often hampered by domestic instability and fragmented territorial control resulting from state failures. Geographical proximity, characterised by porous borders and high levels of cross-border human mobility, directly impacts the security of neighbouring states. This creates a dilemma for security cooperation when one state lacks the capacity for effective governance. Empirically, the paper examines the evolution of Thailand’s security relations with Myanmar over recent decades, highlighting the profound impact of Myanmar’s political instability on Thailand. It analyses how the 2021 military coup and the subsequent collapse of Myanmar’s domestic political order have shaped Thailand’s securitisation of non-traditional security threats. By focusing on issues such as irregular migration, public health issues, drug trafficking, and transboundary pollution, the paper explores how these challenges have been securitised in Thailand and how they have complicated security cooperation between the two countries. The paper contends that the limited territorial control and legitimacy of Myanmar’s military government have significantly hindered Thailand’s ability to address its security concerns effectively. It further calls for security cooperation in the Global South beyond the conventional state-to-state level.

This paper examines South–South security cooperation and regional organisations (ROs) in Africa. Much of the literature on peace and conflict in Africa has focused on ROs and the African Peace and Security Architecture (APSA). Guided by the mantra ‘African solutions to African problems’, these organisations have facilitated several instances of African-led security cooperation. Yet ROs have limited agency and capacity, are institutionally rigid, and are often donor-dependent. As a result, ad hoc security initiatives such as the G5 Sahel and Accra Initiative – our case studies – are on the rise. While such initiatives are better adapted to local context and feature higher levels of autonomy (relative to APSA), we critique this view by showing how donors pressure and trap African governments facing transnational security threats into ad hoc initiatives. These initiatives transform into ‘zombified’ security institutions that rarely live up to the elevated expectations of African and Western stakeholders. This creates a paradox for debates around African agency in security affairs: ad hoc initiatives lock African states into security frameworks that do not respond to their needs but also facilitate the pursuit of donor funding, reassert the national scale of sovereignty, and incentivise new forms of bilateral security cooperation.

This article explores China’s evolving approach to South–South security cooperation, focusing on its use of the security–development nexus in its relations with Global South countries, particularly in the Mekong region. The central research question is: under what circumstances will China adjust the balance between security and development in its cooperation with the Global South? This article uses two case studies in the Mekong region, where China has applied contrasting approaches to address different security-related issues, to explore how China justifies its security choices through the security–development nexus in its relations with Global South countries. The varying security priorities and complex regional dynamics have led to variations in the nature and scope of its security cooperation with the Global South. Drawing on Chinese official documents, media reports, and interviews with scholars and policy advisors, this article argues that China adapts its security–development approach based on three key factors: its perception of security risks, its ability to dominate an issue, and the urgency of its interests. The significance of this research lies in its contribution to the ongoing debate about China’s role in South–South security cooperation. The study also offers insights into the challenges China faces in managing its dual role as both a development partner and a security actor, with implications for its influence in the Mekong region and beyond.

This article explores security cooperation between the Caribbean and Mexico,looking specifically at strategies being pursued to shift the focus in Latin America and the Caribbean from ‘the war on drugs’ to ‘the war on guns’ to address the problem of gun trafficking. This is a shift away from the United States’ priority to that of the region and a move towards a more assertive model of South–South security cooperation. The Caribbean Community and Common Market’s (CARICOM’s) strategy to support Mexico’s tortious and historic lawsuit against American gun manufacturers and to declare a ‘war on guns’ reflects its inability to independently influence the United States’ priorities within the region. Mexico, a Southern country, makes a difference because of its geopolitical relevance to the US, their shared border, and Washington’s attempt to stop the flow of Mexican immigration. We read the Mexico–Caribbean coalition as a significant development in South–South security cooperation (SSSC). Our analysis contributes to an understanding of the nuances and complexities of security cooperation, capacities for scaling up action through SSSC, and the political and legal manoeuvrings involved in challenging hierarchies of power between the so-called global North and South.

South-South security cooperation is increasingly reshaping Africa’s security governance, as emerging actors introduce new military doctrines, institutions, and technologies. Among these, Turkey’s security engagements have become increasingly prominent, influencing military modernization, external dependencies, and security assemblages.This article employs a relational ontology to examine Turkey’s security engagements with African states, arguing that they do not represent a linear shift from Western alliances to South-South cooperation but instead operate within entangled global security hierarchies. This multiplicty stems from Turkey’s “both-and” positioning—as a non-Western, non-core NATO member that is simultaneously expanding security partnerships with the Global South. Furthermore, this study argues that Turkey’s security interactions with African states demonstrates how Turkey actively articulates and adapts logistical, operational, organizational, and normative security practices between the Global South and the Global North, positioning itself as both a recipient and producer of global military norms, rather than acting as a passive intermediary in global security governance. By analyzing Turkey’s military training programs, defense diplomacy, arms sales, and forward-basing strategies n Africa, this article demonstrates how Turkey both reproduces and transforms global security hierarchies by contributing to the homogenization of military practices and security assemblages.

To solve contemporary humanitarian, poverty, and climate crises we need to involve new or more actors and come up with innovative forms of collaborations, partnerships, finance, and solutions adapted to local circumstances. This is one of many reasons for growing interest in South–South security cooperation (SSSC). This concluding article seeks to draw parallels between the growing literature on SSSC and the broader body of literature on South–South cooperation to explore how and to what extent they enrich each other and further our understanding of South–South engagements. The article highlights the heterogeneous and relational nature of SSSC and points to a two-speed global South where larger, (geo)politically more potent and richer countries in the global South assist or export models to, or intervene in, smaller, politically and economically less powerful states. It also highlights internal power dynamics in the global South and carves out the complex ways in which traditional, historically informed power relations also affect the actions of Southern actors.