 We know that the informational genes are tied to matter and structure, but if evolutionary theory – to be general enough to cover cultural and conceptual change – must be devoid of all reference to concrete mechanism, it cannot follow from the theory, for example, that genes are inside organisms or are even parts of organisms, as Dawkins’s language suggests. Strictly, only the correlations between replicator and vehicle due to causal connections of a completely unspecified sort can be implied by such a theory. Striving to get matter and specific structure out of the theory in order to make it apply to immaterial realms may thus leave it bankrupt as an account of causal connection for the material, biological cases. (2005: 79)