The speed and scale of climate change presents unique and potentially monumental security implications for individuals, future generations, international institutions and states. Long-dominant security paradigms and policies may no longer be appropriate for dealing with these new security risks of the Anthropocene. In response to this phenomenon, this book investigates how states have reacted to these new challenges and how their different understandings of the climate-security nexus might shape global actions on climate change. It focuses on the perceptions, framings, and policies of climate security by members of the United Nations Security Council (UNSC), the world's highest ranking multilateral security forum.