CHRISTIANA FIGUERES and TOM RIVETT-CARNAC are cohosts of the leading climate change podcast, Outrage + Optimism, and are cofounders of Global Optimism, an organization dedicated to changing narratives and beliefs and inspiring governments, companies, and citizens to protect what they love from the damages of the climate crisis. Figueres is the former executive secretary of the United Nations Framework Convention on Climate Change, where Rivett-Carnac served as her political strategist. They are known for a unique form of collaborative diplomacy, which led to the unanimous signing of the landmark Paris Agreement on climate change by 195 countries.