Just as domestication relaxed selection for stereotypic songs in the finches—mate choice was supplanted by choices made by the aesthetic sensibilities of bird breeders and their customers—so might our cultural domestication have relaxed selection on many of our primate behavioral traits, allowing old pathways to degenerate and reconfigure.
Baš kao što je pripitomljavanje ublažilo selekciju za sterotipne pesme kod zeba - izbor partnera je zamenjen izborima estetskih osećaja uzgajivača ptica i njihovih mušterija - tako je možda naše kulturno pripitomljavanje ublažilo selekciju mnogih naših primatskih bihejvioralnih crta, omogućujući da stari nervni putevi degradiraju i rekonfigurišu se.