Gerald Allan Cohen, ( KOH-ən; 14 April 1941 – 5 August 2009) was a Canadian political philosopher who held the positions of Quain Professor of Jurisprudence, University College London and Chichele Professor of Social and Political Theory, All Souls College, Oxford. He was known for his work on Marxism, and later, egalitarianism and distributive justice in normative political philosophy. Source: Wikipedia (en)