Daniel Ziblatt's 'Conservative Parties and the Birth of Democracy' examines a puzzle at the heart of democratic transitions: why do privileged groups ever accept systems that empower their opponents? Ziblatt, a political scientist at Harvard, argues that democracy's fate has often depended on how conservative parties manage challenges from their own radical right. When established conservatives channel extremist energies into parliamentary competition, democracy stabilizes; when they lose control of or accommodate radicals, democracy fails. The book compares Britain and Germany from the nineteenth century through the twentieth, showing how British Conservatives successfully absorbed pressures that German conservatives could not, with fateful consequences. Ziblatt traces how party organization, electoral rules, and strategic choices shaped these different trajectories. The book has obvious contemporary relevance as established conservative parties again face challenges from radical movements. Ziblatt's historical analysis illuminates the stakes of choices being made today, without reducing the present to a simple repetition of the past. Readers interested in democratic stability, party politics, or the history of conservatism will find careful comparative analysis that speaks to urgent present concerns.