 So, step by step, as natural selection constructs the species' gene set (chosen from the available mutations), it constructs in tandem the species' developmentally relevant environment (selected from the set of all properties of the world).Thus, "both the genes and the developmentally relevant environment are the product of evolution"' (p. 84).With both our genes and our environment "biological" in nature, the nature/nurture dichotomy lacks any meaning.