Why Are Differences Between Men & Women Being Denied? - Steve Stewart-Williams - #786

Episode Summary

Executive Summary: The conversation explores human behavior through evolutionary psychology, arguing that humans are shaped by gene-based selection and cultural evolution, which can diverge. It covers sex differences, jealousy, mate choice, pair bonding, hunting, occupational segregation, and the role of culture and socialization. A recurring theme is that understanding our evolved psychology can be both deflating and empowering, helping people make better choices about relationships and identity.

Main Topics: Humanity as an alien puzzle (Priority: 5/5): The discussion opens with a framing device: an alien scientist would find humans bizarre because of sex differences, family bonds, jealousy, music, art, and other behaviors with no obvious survival value. Gene selection vs. cultural evolution (Priority: 5/5): The speakers explain selection as replication of genes or memes, emphasizing that culture can evolve partly independently of biological evolution and can push human behavior in different directions. Sex differences and their origins (Priority: 5/5): They debate common misconceptions about sex differences, arguing that many are real, partly innate, often cross-culturally stable, and shaped by reproductive variance and sex-specific selection pressures. Mating systems, jealousy, and pair bonding (Priority: 5/5): The conversation examines why humans are mostly pair-bonding, why jealousy exists, why men and women tend to differ in what infidelity upsets them most, and why humans are not fully monogamous or fully promiscuous. Evidence from twins, toys, and other species (Priority: 4/5): Examples such as identical twins, toy preferences in children and primates, and comparative primate testicle size are used to support evolutionary explanations for behavior and mating strategy. Culture, gender equality, and occupational patterns (Priority: 4/5): They discuss the gender-equality paradox and argue that freer, wealthier societies can show larger sex differences because people express deeper preferences more fully. Evolutionary psychology and personal meaning (Priority: 4/5): The exchange ends on the psychological and philosophical implications of evolutionary thinking: it can reduce self-blame, improve decision-making, and help people choose values beyond genetic imperatives.

Key Arguments: Human beings are unusual not just because of sex differences, but because culture makes us an open-ended system that can evolve independently of biology. Selection acts on replicators: genes in biological evolution and memes in cultural evolution; whichever replicates best becomes more common. Humans are better understood as gene machines and, more specifically, as descendants-maximizing organisms shaped by inclusive fitness and kin selection. The largest human sex differences are often ignored because they are so obvious, especially heterosexual orientation and differences in jealousy, casual-sex interest, aggression, and parental investment. Men’s greater sensitivity to sexual infidelity and women’s greater sensitivity to emotional infidelity are explained by paternity uncertainty and the risk of losing male investment, respectively. Many sex differences persist across cultures, appear early in development, and show hormonal and cross-species parallels, which argues against pure socialization explanations. Cross-cultural and comparative evidence suggests humans are mutual mate choosers, not just males competing and females choosing; both sexes compete and both sexes choose, but asymmetrically. Pair bonding is likely the dominant ancestral mating pattern, though serial monogamy, polygyny, and some casual sex were all part of the human repertoire. The gender-equality paradox may arise because more equal, wealthy, individualistic societies let people express underlying preferences more strongly, not because biology disappears. Evolutionary psychology can be psychologically useful by revealing that many desires are inherited design features, not moral truths, allowing more deliberate choices about relationships and life goals.

Data Points: Twin grief difference: Identical twins grieve more than fraternal twins - Used as evidence that closeness and genetic similarity increase emotional attachment Sex difference effect size: ~0.5 or larger - Mentioned for desire for sexual novelty as a medium sex difference Sexual infidelity jealousy: Men more upset by sexual infidelity; women more upset by emotional infidelity - Discussed as a robust sex difference in jealousy Cross-cultural study sample: 200,000 participants across 53 nations - Evidence for the stability of interest differences between people and objects Cross-cultural replication: 500,000 participants across 80 nations - A second large study finding the same sex difference in interests Hunters-gatherers marriage duration: About 5% of marriages lasted for life - Example from a hunter-gatherer society used to support serial monogamy Human development timeline: 18 to 20 years - Approximate time for nutritional independence in traditional non-state societies Divorces in Darwin’s birth year: 4 - Used to illustrate how rare divorce once was in the UK Selection ratio in primates: Chimps/bonobos high, gorillas low, humans in between - Testicle size and sperm competition reflect mating system intensity

Pivotal Quotes: "It would find us very weird in many different ways." — Steve Stewart-Williams: Explaining how an alien scientist would view humans as the framing device for the book "The soft bigotry of male expectations." — Chris Williamson: A phrase coined in the discussion to describe how male-typed behaviors are often treated as the default or superior norm "If being a puppet is the problem, rejecting an evolutionary perspective isn’t a solution." — Steve Stewart-Williams: On whether evolutionary psychology is disempowering and how environment would be an even harsher puppeteer if genes are ignored

Implications: Listeners are encouraged to see behavior as shaped by evolved tendencies plus culture, not free choice alone. That perspective can reduce self-judgment, improve relationship choices, and clarify debates about sex differences, equality, and identity.