Traditional security actors and institutions facing complex socio-ecological dynamics stand on the brink of change. How do the 15 current UN Security Council member states approach the connections between climate change and security? In the new IFSH Policy Brief, Dr. Judith Nora Hardt presents the research results of the project "Climate Change in the UN Security Council" (CLISEC UNSC) on this question. The results illustrate how essential it is for the Security Council to recognize the interrelations of climate and security and their multiple effects. The policy brief emphasizes the urgent need for institutional, multilateral and scientifically-informed change to ensure international peace and security. The detailed research results will be published in the upcoming IFSH Research Report #5 "A Climate for Change in the UNSC? Member States' Approaches to the Climate-Security Nexus".