Eugen Slutsky is well-known to any graduate student in economics for two landmark articles and two operational concepts bearing his name, one in the field of consumer and utility theory ("the Slutsky equation"), the other in the field of the theory of cycles, introducing autonomous and exogenous causes in the analysis of macroeconomic fluctuations ("the Slutsky-Yule effect"). Because of the historical and political circumstances he had to confront in Ukraine, and then in Russia and in the U.S.S.R. in the first half of 20th century, Slutsky was prevented from devoting himself fully to mathematical economics, and he only published a handful more of articles dealing with economics. Over the last twenty years, researchers in Europe, Ukraine and Russia have been involved in making his contributions to mathematics and economics better known. By now, we get a clearer picture of Slutsky's views on economics and we know his network of connections with Western scholars who contributed to draw attention to his work. This essay highlights Slutsky's lasting importance in economics, focusing on the fate of his major and lesser known works.