This book constitutes a systematic and critical assessment of the nature, evolution, and prospects of the development partnership between the 79-member African, Caribbean, and Pacific (ACP) group of states and the 28-member European Union (EU). A core theme that runs through the work is that the ACP's partnership with the EU remains an important framework for addressing development challenges in the African, Caribbean, and Pacific regions, but needs to adapt to changes in the global political economy, as well as internal developments in both the ACP and the EU, to sustain its relevance and effectiveness. This is crucial for the ACP group, in particular, given its origins in, and core focus on, development cooperation with Europe. The authors in this volume examine the history of the ACP-EU partnership since 1975; the EU's relationship with the African, Caribbean, and Pacific regions individually; ACP experiences with economic partnership agreements with the EU; and new political issues, in particular, security, migration, and diasporas. Shedding light on the future prospects of this relationship, this book will be of interest to both scholars and policymakers working on the ACP-EU relationship and related development issues, including trade, aid, security, and migration.