A 121-nation study of societal collectivism and a 174-nation study of political autocracy show that parasitic stress does not account for any variation in these components of culture once the interactive impacts of climatic demands and income resources have been accounted for. Climato-economic livability is a viable rival explanation for the reported effects of parasitic stress on culture.

Krueger & Funder's (K&F's) diagnosis of social psychology's obsession with bias is correct and accords with similar observations by self-categorization theorists. However, the analysis of causes is incomplete and suggestions for cures are flawed. The primary problem is not imbalance, but a failure to acknowledge that social reality has different forms, depending on one's social and political vantage point in relation to a specific social context.

On the basis of a reinterpretation of the International Sexuality Description Project (ISDP) data, we suggest that findings are consistent with the view that human reproductive behaviour is largely under social control. Behaviours associated with a high Sociosexual Orientation Index (SOI) may be part of a progressive change in reproductive behaviour initiated by the dispersal of kin that occurs as societies modernize.