Négritude is a framework of critique and literary theory, developed mainly by francophone intellectuals, writers, and politicians of the African diaspora during the 1930s. Its initiators included Martinican poet Aimé Césaire, Léopold Sédar Senghor (the first President of Senegal), and Léon Damas of French Guiana. Négritude intellectuals disavowed colonialism, and argued for the importance of a Pan-African racial identity among people of African descent worldwide. The intellectuals employed Marxist political philosophy, in the black radical tradition. The writers generally used a realist literary style, and some say they were also influenced somewhat by the Surrealist stylistics. In 1932, the manifesto "Murderous Humanitarianism" was signed by prominent Surrealists, including the Martinicans Pierre Yoyotte and J. M. Monnerot.