WHEN WITTGENSTEIN'S TRACTATUS was published it was generally identified first with Russell's logical atomism, and later with the logical positivism of the Vienna Circle. However, Wittgenstein himself claimed the work had an ethical purpose. In what has become a well-known passage from a letter to Ludwig von Ficker, the editor of Der Brenner, whose help Wittgenstein sought in trying to publish the Tractatus, he says.