4The perfect books for the true book lover, Penguin's Great Ideas series features twelve more groundbreaking works by some of history's most prodigious thinkers. Each volume is beautifully packaged with a unique type-driven design that highlights the bookmaker's art. Offering great literature in great packages at great prices, this series is ideal for those readers who want to explore and savor the Great Ideas that have shaped our world.

Rousseau's explosive cry for human liberty helped to spark the French Revolution and has haunted our discussions of how we should rule one another ever since--seen as both a blueprint for political terror and as a fundamental statement of democracy.