The world’s addiction to fossil fuels is the main contributor to the climate crisis, and it impacts peace and security worldwide. This was clearly demonstrated in 2022 by Russia’s invasion of Ukraine. But why is it so difficult for nations to move away from fossil fuels? Part of it can be explained by the so-called energy trilemma, according to Marie Stjernquist Desatnik, Senior Climate Policy Advisor at Naturskyddsföreningen (the Swedish Society for Nature Conservation, SSNC). She argues that transitioning towards renewable forms of energy is essential to achieve human security worldwide.