James Burnham (November 22, 1905 – July 28, 1987) was an American philosopher and political theorist. Burnham was a prominent Trotskyist activist in the 1930s, as well as a well-known isolationist. In later years Burnham left Marxism and became a public intellectual of the American conservative movement. His book The Managerial Revolution, published in 1941, speculated on the fate of capitalism. Burnham was also an editor and a regular contributor to the American conservative publication National Review on a variety of topics.