According to the dual inheritance theory, cultural learning in our species is a biased and highly efficient process of transmitting cultural traits. Here we define a model of cultural learning where social learning is integrated as a complementary element that facilitates the discovery of a specific behavior by an apprentice, and not as a mechanism that works in opposition to individual learning. In that context, we propose that the emergence of the ability to approve or disapprove of offspring behavior, orienting (...) their learning, transformed primate social learning into a cultural transmission system, like that which characterizes our species. Assessor teaching facilitates the replication and/or reconstruction of behaviors that are difficult to imitate and helps to determine which behaviors should be imitated. We also explore the form in which assessor teaching has conditioned the evolution of our abilities to develop cultures in the hominin line, converting us into individuals equipped with what we call a suadens psychology. Our main point is to defend the hypothesis that suadens psychology determines the stability and dynamics that affect the trajectories of many cultural characters. We compare our proposal with other theories about cultural evolution, specifically with dual inheritance theory and cultural attraction theory. (shrink)

We consider the evolutionary scheme of morality proposed by Tomasello to defend the idea that the ability to orient the learning of offspring using signs of approval/disapproval could be a decisive and necessary step in the evolution of human morality. Those basic forms of intentional evaluative feedback, something we have called assessor teaching, allow parents to transmit their accumulated experience to their children, both about the behaviors that should be learned as well as how they should be copied. The rationale (...) underlying this process is as follows: if a behavior is approved, then it is good; if it is disapproved, then it is bad. The evaluative guidance on how to behave most probably spread among peers in situations of mutual benefit, such as cooperative child rearing. We argue that our hominin ancestors provided with this capacity for assessor teaching were ideally positioned to develop the two specifically human levels of morality proposed by Tomasello: the morality of fairness and the morality of justice. Assessor teaching could have facilitated the genesis of rudimentary codes of behavior tied with the need to agree about how to behave to succeed in joint cooperative activities. Moreover, learning through assessor teaching provides a plausible explanation for the origin of the objectivist and prescriptive dimensions of human morality. First, we emphasize that individuals feel that they evaluate the behavior of others objectively to guide their learning, and, second, we underline the imperative intention that any moral manifestation possesses. (shrink)