This book introduces a new approach to understanding security in the Mediterranean and explores current challenges at the European Union (EU) Mediterranean borders. It investigates the intertwined area at the South of the EU that we call the 'Mediterranean Global South' where common actions and strategies are required to face common security challenges. The book critically addresses the EU's capacity to manage its expanding borders and analyses the actors involved in providing security in the Mediterranean Global South. Specific attention is devoted to South to North migration, one of the most critical security issues of current times, deploying its effects well beyond states' borders.