E.E. Slutsky is perhaps the Russian/Ukrainian economist most quoted by mainstream economists today. This is the first research monograph to examine the life and work of the internationally-renowned economist and mathematician. It does so from both a 'history of economics' perspective and a 'history of science' perspective, bringing these two strands together in order to demonstrate Slutsky's enduring legacy as an innovative researcher and an influential intellectual. It also presents some of Slutsky's lesser-known (and hitherto-unavailable) works in English translation.