Indian independence leader Mohandas Gandhi (a.k.a. Mahatma Gandhi) was impressed by Thoreau's arguments. In 1907, about one year into his first satyagraha campaign in South Africa, he wrote a translated synopsis of Thoreau's argument for Indian Opinion, credited Thoreau's essay with being "the chief cause of the abolition of slavery in America", and wrote that "Both his example and writings are at present exactly applicable to the Indians in the Transvaal." He later concluded:
Thoreau was a great writer, philosopher, poet, and withal a most practical man, that is, he taught nothing he was not prepared to practice in himself. He was one of the greatest and most moral men America has produced. At the time of the abolition of slavery movement, he wrote his famous essay On the Duty of Civil Disobedience. He went to gaol for the sake of his principles and suffering humanity. His essay has, therefore, been sanctified by suffering. Moreover, it is written for all time. Its incisive logic is unanswerable.— "For Passive Resisters" (1907).
Martin Luther King, Jr.
American civil rights leader Dr. Martin Luther King, Jr. was also influenced by this essay. In his autobiography, he wrote:
During my student days I read Henry David Thoreau's essay On Civil Disobedience for the first time. Here, in this courageous New Englander's refusal to pay his taxes and his choice of jail rather than support a war that would spread slavery's territory into Mexico, I made my first contact with the theory of nonviolent resistance. Fascinated by the idea of refusing to cooperate with an evil system, I was so deeply moved that I reread the work several times.
I became convinced that noncooperation with evil is as much a moral obligation as is cooperation with good. No other person has been more eloquent and passionate in getting this idea across than Henry David Thoreau. As a result of his writings and personal witness, we are the heirs of a legacy of creative protest. The teachings of Thoreau came alive in our civil rights movement; indeed, they are more alive than ever before. Whether expressed in a sit-in at lunch counters, a freedom ride into Mississippi, a peaceful protest in Albany, Georgia, a bus boycott in Montgomery, Alabama, these are outgrowths of Thoreau's insistence that evil must be resisted and that no moral man can patiently adjust to injustice.— The Autobiography of Martin Luther King, Jr.
Existentialist Martin Buber wrote, of Civil Disobedience
I read it with the strong feeling that here was something that concerned me directly.... It was the concrete, the personal element, the "here and now" of this work that won me over. Thoreau did not put forth a general proposition as such; he described and established his attitude in a specific historical-biographic situation. He addressed his reader within the very sphere of this situation common to both of them in such a way that the reader not only discovered why Thoreau acted as he did at that time but also that the reader—assuming him of course to be honest and dispassionate– would have to act in just such a way whenever the proper occasion arose, provided he was seriously engaged in fulfilling his existence as a human person. The question here is not just about one of the numerous individual cases in the struggle between a truth powerless to act and a power that has become the enemy of truth. It is really a question of the absolutely concrete demonstration of the point at which this struggle at any moment becomes man's duty as man....— "Man's Duty as Man" (1962)
Author Leo Tolstoy cited Civil Disobedience as having a strong impact on his nonviolence methodology. Others who are said to have been influenced by Civil Disobedience include: President John F. Kennedy, Supreme Court Justice William O. Douglas, and various writers such as, Marcel Proust, Ernest Hemingway, Upton Sinclair, Sinclair Lewis, and William Butler Yeats.