This Handbook brings together 30 state-of-the-art essays covering the essential aspects of global security research and practice for the 21st century.

• Embraces a broad definition of security that extends beyond the threat of foreign military attack to cover new risks for violence
• Offers comprehensive coverage framed around key security concepts, risks, policy tools, and global security actors
• Discusses pressing contemporary issues including terrorism, disarmament, genocide, sustainability, international peacekeeping, state-building, natural disasters, energy and food security, climate change, and cyber warfare
• Includes insightful and accessible contributions from around the world aimed at a broad base of scholars, students, practitioners, and policymakers

Mary Kaldor is Professor of Global Governance and Director of the Civil Society and Human Security Research Unit at the London School of Economics. She is the author of many books, including New & Old Wars: Organized Violence in a Global Era (2013) and The Ultimate Weapon is No Weapon: Human Security and the Changing Rules of War and Peace (2010). She was a founding member of European Nuclear Disarmament and of the Helsinki Citizen’s Assembly.

Iavor Rangelov is Global Security Research Fellow at the Civil Society and Human Security Research Unit at the London School of Economics. He is co-chair of the London Transitional Justice Network and author of Nationalism and the Rule of Law: Lessons from the Balkans and Beyond (2014).