The proposition that migration as a result of climate change has consequences for regional and global security has become prominent in public discourse over the last few years. Yet much of that debate in the Southeast Asian context is not sufficiently well informed by current knowledge on the demographics of migration and the kinds of choices that people and communities make about mobility; nor does it pay adequate attention to the human insecurities that result from climate change in general and climate change-induced migration in particular. This volume seeks to overcome some of those limitations, drawing on insights from international relations, international law, demography, public policy, geography, environmental studies and climate science. It shows how a human security approach can sustain the tactical attractions of a security discourse in bringing urgent attention to a problem such as climate change and migration, while also redirecting security policy to protecting and empowering those who are most vulnerable to the threats of climate change.