Book excerpt: Species are going extinct, forests are burning, and children are worried about the future and their peers worldwide. But that is not the whole story: One Friday in 2018, a few young people joined Greta Thunberg to protest, and the global climate strike movement was born. Scientist David Fopp spent 250 Fridays with the newly formed grassroots movements. Together with activists Isabelle Axelsson and Loukina Tille, he offers an insider perspective on how scientists and activists can fight for a just and sustainable global society. The volume also offers both an introduction to ecophilosophy and a unified science of democracy in times of interdependent crises. How can research in all disciplines - from (drama) education and economics to psychology - help with this struggle? And how can we all fight the climate crisis by transforming and deepening democracy?