In January, the Biden Administration released the Executive Order on Tackling the Climate Crisis at Home and Abroad. It is a sweeping document that integrates climate concerns into policy and governance, including into national security. It recognizes that environmental security, the integration of environmental considerations into national security strategy, policy, and programs, is essential to combat the global climate crisis and should be mainstreamed across U.S. government efforts. The idea is not a new one. One of the authors (Goodman) led early environmental security efforts in the U.S. Department of Defense (DoD) for 8 years of the Clinton Administration in the 1990s, during the first chapter of awareness of environmental considerations in defense and foreign policy.