Errol Eustace Harris (19 February 1908 – 21 June 2009), sometimes cited as E. E. Harris, was a South African philosopher. His work focused on developing a systematic and coherent account of the logic, metaphysics, and epistemology implicit in contemporary understanding of the world. Harris held that, in conjunction with empirical science, the Western philosophical tradition, in its commitment to the ideal of reason, contains the resources necessary to accomplish this end. He celebrated his 100th birthday in 2008.