To understand adaptation (and exaptation), a more comprehensive view of development is required: one beyond a constraining force. Developmental plasticity may be an adaptation by natural selection simultaneously favored (or sometimes in conflict) at multiple levels of biological organization (e.g., cells, individuals, groups, etc.). To understand the interrelationships between developmental plasticity and adaptive evolution I borrow heavily from West-Eberhard (2003) and Frank (1995; 1997). Developmental plasticity facilitates evolution, results in particular patterns of evolutionary change, and may produce exaptations by design (...) rather than by chance. (shrink)

Genomic conflicts are potentially involved in the evolution and maintenance of culture. Maternal genes contributing to neocortical development could influence biases in the acquisition of information. Specifically, relatedness asymmetries due to multiple paternity are expected to lead to an increased reliability and receptivity of matrilineally-transmitted information. This view complements the gene-culture coevolutionary model adopted by Rendell and Whitehead.

Three complementary points to Jaswal & Akhtar are raised: (1) As a person with autism, I desire sociality despite vulnerability to others’ antisocial behaviour; (2) Asperger's conflation of autism with psychopathy (Czech 2018) likely caused clinicians to disregard social motivation among those with autism; and (3) adverse experiences cause social-engagement diversity to develop in all people, not just those on the spectrum.

The adaptationist framework is necessary and sufficient for unifying the social and natural sciences. Gintis's “beliefs, preferences, and constraints” (BPC) model compares unfavorably to this framework because it lacks criteria for determining special design, incorrectly assumes that standard evolutionary theory predicts individual rationality maximisation, does not adequately recognize the impact of psychological mechanisms on culture, and is mute on the behavioural implications of intragenomic conflict. (Published Online April 27 2007).