Steven Levitsky and Daniel Ziblatt, Harvard political scientists who study democratization around the world, turn their expertise to the United States. They argue that democracies rarely die through coups or revolutions; instead, they are killed by elected leaders who gradually subvert institutions from within. Drawing on cases from Europe and Latin America, they identify warning signs: politicians who reject democratic rules, deny the legitimacy of opponents, tolerate or encourage violence, and curtail civil liberties. The authors examine American history, showing how norms of mutual toleration and institutional forbearance prevented conflict from destroying democracy, and how the weakening of those norms in recent decades has increased danger. They analyze specific developments—partisan gerrymandering, Senate obstruction, politicized courts—as symptoms of democratic erosion. The book avoids partisan point-scoring while clearly arguing that threats to democratic norms are not symmetrical. Levitsky and Ziblatt offer both diagnosis and prescription, suggesting reforms that might reduce polarization and restore guardrails. For citizens concerned about democracy's future, this book provides analytical tools for understanding what's at stake.