Unpredictability! and the Function of Mind in Nature

Godfrey-Smith thinks and writes with impressive precision and clarity, a clarity that enables him to see subtle (and important) conceptual distinctions. For example, at one point in his book, Complexity and the FrIrrCtinn qf A1illd ill Naw,.e, he argues that exterIlalists and internalists in biology not only invoke different explaiiatioiis-exteriialists typically invoking selection and internalists developmental collstraints-but also consider different phenomena as central, as requiring explanation. Externalists are concerned mainly with explaining the enormous diversity of the organic world, its heterogeneity or complexity, whereas internalists are more interested in order, in the