Moral conscience can lead to civil disobedience according to transcendentalist thinkers Ralph Waldo Emerson and Henry David Thoreau. They believed people have an innate moral sense to distinguish right from wrong that transcends experiences. Thoreau spent a night in jail for refusing to pay taxes to protest the government's support of slavery and war with Mexico. He wrote an essay called "On the Duty of Civil Disobedience" advocating rejecting unjust laws. Thoreau argued that one's moral duty to reject slavery took precedence over obeying the government, which enforced slavery. His ideas influenced later leaders like Martin Luther King Jr. and Gandhi in adopting civil disobedience to protest injustice.