SUMMARYTo be Marxist at the turn of the twentieth century was highly contested. During this crisis of Marxism, identity politics were acute, exemplified by the private and public debate between Eduard Bernstein and Karl Kautsky. With Bernstein's celebrated turn away from the Marxist theory of his day, the grounds for being Marxist were at stake. Was it possible to criticise Marx's analysis of industrial capitalism, his account of historical change and his hard-nosed class politics, and yet still be in a (...) position to carry his name forward? Moreover, the springing-up of another identity, Revisionist, suggested that being Marxist was ambiguous. If one accepted Bernstein's and the Revisionists' point that Marxists had become too orthodox, leaving Revisionists as the true heirs of Marx's critical socialist spirit, then the Marxist identity was so open as to be meaningless. In this article, I contend that the name-calling of this period, the Revisionismusstreit, should be seen as creative. In contrast to politico-ideological perceptions of the Streit, which construe the clash of Marxist and Revisionist as representative of foundational Social Democratic party political realities, I highlight the manner in which being Marxist—the veneration of Marx's and Friedrich Engels's word into a Marxology of sorts by Marxists and Revisionists alike—held a certain epistemic value in its own right. (shrink)