The multiple realizability of macro-level types does not, in my opinion, prove that “the explanations provided by the macro-theory [in which such types occur] will not, EVEN IN PRINCIPLE, be reducible to a micro-account” (Reconstructing Marxism, p. 120, my emphasis). For multiply-realizable macro-level types may be reducible to highly-complex disjunctions of micro-level types. (Indeed in such c...