In 1931, writing in a personal journal, Wittgenstein enumerated the names of those thinkers whom he deemed to have been his most important intellectual influences. He makes the strong claim that these are thinkers whose seminal ideas he has taken over, further elaborated and incorporated into his own work. Here are the names he lists in their order of appearance: Boltzmann, Hertz, Schopenhauer, Frege, Russell, Kraus, Loos, Weininger, Spengler, Sraffa. At the time of the first publication of this list in (...) Culture and Value, those familiar primarily with the most widely read and influential writings on Wittgenstein and his philosophical influences, Norman Malcolm's Memoir and Toulmin and Janik's Wittgenstein's Vienna, would most likely have been surprised by the inclusion of Spengler's name. His is the only one on the list that does not appear in either book. Every other thinker named is not only mentioned as an influence on Wittgenstein in one or the other work, but some of the purported details of that influence are offered. And the appearance of Spengler's name is doubly surprising, given the relatively low esteem in which his work is generally held. Of the others listed, perhaps only Weininger fails to emerge as a respected figure. (shrink)