This book analyses the evolution of the North Atlantic Treaty Organization (NATO) and its policies from the Cold War until today. NATO’s future cannot be fully understood without analysing its past: the origins of its structure and goals, and their transformation over time.  By exploring NATO’s geopolitical and military role at crucial points throughout history, this edited volume considers the challenges and threats which have faced the alliance, as well as its strengths and weaknesses. It covers highly-debated and unresolved issues such as budgetary burden-sharing and the military transatlantic gap, the enlargement process, and the role of Asia in influencing NATO’s policies. Combining a historical approach with international perspectives, this book is an interdisciplinary read that will appeal to scholars of diplomatic history and international relations. Chapters 1 and 2 are available open access under a Creative Commons Attribution 4.0 International License vialink.springer.com.