Book excerpt: In this collection of essays, Michael Walzer discusses how obligations are incurred, sustained, and (sometimes) abandoned by citizens of the modern state and members of political parties and movements as they respond to and participate in the most crucial and controversial aspects of citizenship: resistance, dissent, civil disobedience, war, and revolution. Walzer approaches these issues with insight and historical perspective, exhibiting an extraordinary understanding for rebels, radicals, and rational revolutionaries. The reader will not always agree with Walzer but he cannot help being stimulated, excited, challenged, and moved to thoughtful analysis.