In 'Civil Disobedience,' Henry David Thoreau argues that people should not allow governments to overrule their conscience. He explains why he refused to pay taxes to protest slavery and the Mexican-American War, spending a night in jail for his principles. The essay challenges readers to think about when it's right to peacefully break unjust laws and what it means to be a responsible citizen. Thoreau's powerful ideas about individual conscience versus government authority have inspired protest movements around the world for over 150 years.