Gray's account of a brain mechanism for generating the contents of consciousness is incomplete. Adaptive advantages of conscious functioning need to be sought within the first-person affective sensation motivating flexibly goal-directed actions, as in Humphrey's sensory feedback theory.

Sober and Wilson's enthusiasm for a multi-level perspective in evolutionary biology leads to conceptualizations which appropriate all sources of bio-altruistic traits as products of ‘group’ selection. The key biological issue is whether genes enhancing one sub-population's viability in competition with others can thrive, despite inducing some members to lose fitness in intra-group terms. The case for such selection amongst primates remains unproven. Flexible social loyalties required prior evolution of subjective self-definition and self-identification with others. But normative readiness for truly group-serving (...) sacrifices of ego-interests presupposes entitative conceptions of in-groups as collective social units -- only made possible with the emergence of human symbolic language. (shrink)

Gangestad & Simpson make a convincing case for male and female psychological access to sexual strategies that dispose us towards both faithful long-term mating and promiscuity – according to socio- ecological conditions. However, their model fails to acknowledge how the human self-system's mediation of conduct can permit us to override voluntarily the pseudo-imperatives of optimizing inclusive fitness.