Benjamin Ricketson Tucker (/ˈtʌkər/; April 17, 1854 – June 22, 1939) was an American anarchist. A 19th-century proponent of individualist anarchism which he called "unterrified Jeffersonianism", Tucker was the editor and publisher of the American individualist anarchist periodical Liberty (1881–1908) as well as a member of the socialist First International.
Tucker harshly opposed state socialism and was a supporter of libertarian socialism which he termed anarchist or anarchistic socialism as well as a follower of mutualism. He connected the classical economics of Adam Smith and the Ricardian socialists as well as that of Josiah Warren, Karl Marx and Pierre-Joseph Proudhon to socialism. Later in his life, Tucker converted to Max Stirner's egoism.