 Yet people and their responses to the world are also part of each person’s environment. Boyd and Richardson argue that human societies ought to be viewed as an adaptive environment, which in turn has consequences for how individual behavior is evaluated. Human societies contain a large reservoir of information that is preserved through generations and expanded upon, despite limited, imperfect learning by the members of human societies. Imitation, which is a common strategy in humans, including pre-verbal infants (Gergely, Bekkering, &amp; Király 2002), is central to cultural transmission (Boyd &amp; Richerson 2005) and the emergence of social norms (Bicchieri &amp; Muldoon 2014). In our environment, only a few individuals with an interest in improving on the folk lore are necessary to nudge the culture to be adaptive. The main advantage that human societies have over other groups of social animals, this argument runs, is that cultural adaptation is much faster than genetic adaptation (Bowles &amp; Gintis 2011). On this view, human psychology evolved to facilitate speedy adaptation. Natural selection did not equip our large-brained ancestors with rigid behavior, but instead selected for brains that allowed then to modify their behavior adaptively in response to their environment (Barkow, Cosmides, &amp; Tooby 1992).