Democracy is in crisis throughout the world. And courts play a key role within this process as a main target of populist leaders and in light of their ability to hinder administrative, legal, and constitutional changes. Focusing on the ability of courts to block constitutional changes, this Article analyzes the main tensions situated at the heart of democratic erosion processes around the world: the conflict between substantive and formal notions of democracy; a conflict between believers and nonbelievers that courts can save democracy; and the tension between strategic and legal considerations courts consider when they face pressure from political branches. Using comparative examples, the Article demonstrates how courts can indeed function...