In South Africa he became the leader of a movement to secure civil rights for Indians. Imprisoned for his efforts, he read Henry David Thoreau’s Civil Disobedience in the appropriate setting—a jail cell. Along with Buddhist and Jainist writings, Thoreau was to have an enormous influence on him. He was struck by Thoreau’s assertion: “The only obligation which I have a right to assume is to do at any time what I think right.”