James Alexander Malcolm Caldwell (27 September 1931 – 23 December 1978) was a British academic and a prolific Marxist writer. He was a consistent critic of American foreign policy, a campaigner for Asian communist and socialist movements, and a supporter of the Khmer Rouge. Malcolm Caldwell was murdered, under mysterious circumstances, a few hours after meeting Pol Pot in Cambodia.
Malcolm Caldwell was born in Scotland, the son of a coal miner. He obtained degrees from University of Nottingham and University of Edinburgh. He completed two years' national service in the British army, becoming a sergeant in the Army Education Corps. In 1959 he joined the School of Oriental and African Studies at the University of London as a Research Fellow. Although he met with conservative opposition within the School, he remained on its faculty throughout his life. As well as being an academic, he was an energetic and committed radical political activist. He was dedicated to criticising Western foreign policy and capitalist economics, paying particular attention to American policy. He was a founding editor of the Journal of Contemporary Asia, a journal concerned with revolutionary movements in Asia. In 1978 Caldwell was one of the Labour Party candidates in St Mary's ward in local elections in Sidcup, Bexley.
Caldwell was one of the staunchest defenders of the Pol Pot regime. He frequently attempted to downplay reports of mass executions by the Khmer Rouge in Cambodia and was widely criticized by many authorities for doing so.