Where would you expect to find sex based differences in career choice most diminished? If you guessed in countries with more wealth and egalitarian culture, you would be wrong. David Geary discusses and interprets the data in his article, "The Nurture of Evolved Sex Differences: Why favorable conditions produce larger sex differences." In wealthy countries like Norway, increased numbers of women pour into fields that are "people oriented" rather than "thing oriented." Consider, first, this data:

As reviewed by Schmitt and colleagues [33], sex differences in many aspects of personality, self-esteem, and cognitive and psychological functioning are larger in WEIRD, gender equal countries. For instance, women are generally more cooperative and agreeable than men and men are more Machiavellian than women, on average. These differences are larger in more egalitarian countries. One potential reason is that religious prohibitions and proscriptions increase social cooperation and decrease self-serving behaviors in men and this in turn reduces the sex differences in these areas. The release of these prohibitions enables fuller expression of underlying differences; in this case, a decrease in men’s agreeableness and an increase in their use of Machiavellian social strategies [34].

Occupational segregation also increases in WEIRD, gender equal countries, presumably due to underlying differences in preferences for working with and helping people as contrasted with working with things [35]. Girls’ and women’s greater interest in other people and relationships follows from their greater investment in children and their need to develop BFF (best friends forever) relationships that serve as a source of social and emotional support. Boys’ and men’s greater interest in things likely follows from an evolutionary history of tool making, most of which is done by men.

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