Abstract

This papes discusses Moritz Schlick’s “Austrian” psychophysical identity theory, formulated in the Allgemeine Erkenntnislehre, and compares it to the similar views of Russell and to contemporary Russellian monism. A close similarity between Russell’s and Schlick’s views was already stated by Herbert Feigl long ago; beyond investigating this relation, my aim is also to identify features contemporary Russellian monists may have in common with their historical ancestors. I argue that they share some fundamental assumptions: linguistic physicalism, an ontology that may be characterized as physicalist dualist property pluralism, and a dual-language account of the psychophysical identity thesis which is an alternative to reductionist materialism. Further, Schlick, Russell and Chalmers ground these tenets on a structuralist account of the meaning of physical terms which, however, they lay out in importantly different ways.