’This book offers important insights into evolving notions of power, particularly with regard to global flows of people, goods, services, money, ideas, toxins and terror. The authors explore how the United States is developing agile networks to safeguard such flows as part of the global commons. Useful for anyone interested in key trends and the changing role of the United States in world affairs.’ Daniel Hamilton, Johns Hopkins University, USA ’Securing and governing the global commons and flows is one of the great challenges of the 21st century. The book's analysis of how the world’s only superpower is navigating these tricky waters is done with an admirable and unusual combination of theoretical strength and practical policy relevance. Innovative and highly topical, this book makes an important contribution to the fields of Security Studies and IR.’ Robert Egnell, Georgetown University, USA