In the post-war period the British began a process of decolonisation across the British Empire. In 1945 universal suffrage was introduced to Trinidad and Tobago. Political parties emerged on the island, however these were largely divided along racial lines: Afro-Trinidadians and Tobagonians primarily supported the People's National Movement (PNM), formed in 1956 by Eric Williams, with Indo-Trinidadians and Tobagonians mostly supporting the People's Democratic Party (PDP), formed in 1953 by Bhadase Sagan Maraj, which later merged into the Democratic Labour Party (DLP) in 1957. Britain's Caribbean colonies formed the West Indies Federation in 1958 as a vehicle for independence, however the Federation dissolved after Jamaica withdrew following a membership referendum in 1961. The government of Trinidad and Tobago subsequently chose to seek independence from the United Kingdom on its own.