A bold new conception of the republic for a planet in crisisRepublicanism is arguably the most powerful political idea in history, an extraordinary feat of human imagination that balances individual liberty with collective responsibility. The Environmental Republic reclaims this idea as the path to sustaining our life together on a changing planet, reframing our relationship to the environment not as a constraint on liberty but as its republican foundation. Giulio Boccaletti argues that we must renew our commitment to freedom and civic responsibility through popular sovereignty. He presents the environmental republic as a necessary alternative to blind faith in technocratic management, the shallow moralizing and apocalyptic rhetoric of some activists, and the disingenuous skepticism of vested interests. Our environmental challenges are not simply about “agreeing on the facts” or living within technical limitations—they reflect a deeper failure of political institutions. Drawing on the history of ideas and real-world examples, Boccaletti presents a political framework that places our relationship to our surroundings at the heart of how we exercise our voice, coordinate collective action, and define development itself. Offering hope in an anxious age of rising authoritarianism and widespread pessimism, The Environmental Republic challenges the false choice between environmental protection and human freedom, showing how place-based institutions can deliver both sustainability and human development through true self-governance.