Book excerpt: What is Non-Traditional Security? How have our understandings of security changed over the past decade? What are the dominant non-traditional security challenges we face in the world today? The concept of national security remains contested but our understanding of it continues to evolve as it is shaped by the world around us. From a globally dominant 'traditional' understanding of security during the Cold War characterised by a focus on countries and their militaries protecting their sovereignty to today, where non-military threats such as global pandemics, climate change, energy, to disasters threaten the wellbeing and livelihoods of people, communities, and the environment that form the backbone of society. The global dial has shifted towards a more comprehensive understanding of security that recognises these non-traditional security threats moving the focus away from solely the survival of the state to the empowerment and protection of people and the environment. This shift highlights the experiences of different individuals and communities, from civilians affected by war to irregular migrants moving from one place to the next, and what the world witnesses as efforts to empower and protect people and the environment. Indeed, comprehensive security has a long history in the post-colonial Asia-Pacific. Non-Traditional Security emerged after the 1997 Asian Financial Crisis. It emerged as a way to recalibrate the ways governments engaged people and communities and developed pathways for countries in the region to cooperate. Non-Traditional Security in the Asia-Pacific: A Decade of Perspectives, an interdisciplinary collection, is essential reading for anyone interested in the developments of security with a focus on the dominant non-traditional security threats in the Asia-Pacific over the last decade - from advanced undergraduates, graduate students, and scholars, to policymakers at the local, national, regional, and international levels.