 Shelley's theories of economics and morality, for example, had a profound influence on Karl Marx (1818–1883); his early—perhaps first—writings on nonviolent resistance influenced Leo Tolstoy (1828–1910), whose writings on the subject in turn influenced Mahatma Gandhi, and through him Martin Luther King Jr. and others practicing nonviolence during the American civil rights movement.Shelley became a lodestar to the subsequent three or four generations of poets, including important Victorian and Pre-Raphaelite poets such as Robert Browning (1812–1889) and Dante Gabriel Rossetti (1828–1882).Admirers have included Oscar Wilde, Thomas Hardy, George Bernard Shaw, Leo Tolstoy, Bertrand Russell, W. B. Yeats, Upton Sinclair and Isadora Duncan.