I am an admirer of Rudolf Haller's Questions on Wittgenstein. Haller's study of the historical influences on Wittgenstein's ideas and the relation between Wittgenstein's early and later thought provides a much needed corrective to many of the myths and interpretive inaccuracies that have surrounded Wittgenstein's work. Haller's detailed knowledge of Wittgenstein's writings in the context of Anglo-European and especially Austrian intellectual currents make his examination of the well-chosen topics in these essays among the most authoritative portraits of Wittgenstein's philosophy.¹