Steve Stewart-Williams
@SteveStuWill
Author of "A Billion Years of Sex Differences" (2026), "The Ape That Understood the Universe" (2018), and "Darwin, God and the Meaning of Life" (2010).
225 Following 268.7K Followers
Sex differences that suggest that human males are adapted for combat.
"The evidence for g’s importance is overwhelming. People with higher IQs tend to stay in education longer, enter higher-status occupations, earn more, enjoy better health, and even live longer."
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A comprehensive new review in The Lancet concludes that mRNA vaccines are safe and effective, and have enormous potential for tackling infectious diseases, cancer, and autoimmune disorders.
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Why Two People with the Same IQ Can End Up Living Very Different Lives
Four graphs that change how we think about intelligence and achievement
The evolution of relationship advice on Reddit.
Sex differences that suggest that human males are adapted for combat.
"The evidence for g’s importance is overwhelming. People with higher IQs tend to stay in education longer, enter higher-status occupations, earn more, enjoy better health, and even live longer."
Show more
Husbands who earn less than their wives report poorer mental health - and wives in the primary breadwinner role tend to be less satisfied with their relationships.
Why Two People with the Same IQ Can End Up Living Very Different Lives
Four graphs that change how we think about intelligence and achievement
The Nature and Nurture of Self-Control
Self-control is around 60% heritable - that is, genes explain roughly 60% of the differences between individuals in their levels of self-control.
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Self-Control as a Performance-Enhancing Drug
Self-control is an all-purpose good like IQ: It predicts health, wealth, and all things good.
Husbands who earn less than their wives report poorer mental health - and wives in the primary breadwinner role tend to be less satisfied with their relationships.
👏"Several academics have confirmed that they’ll be using it in their classes... Ideas that seemed almost unspeakable a few years ago are increasingly being discussed openly and seriously"
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Many people lament Scientific American becoming politicized and woke.
But it’s the worsening editorial standards that made it into a platform for pseudoscience.
@jsmoliga shares a sadly all too typical example:
HT @docgrawitch
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"One of the largest and most repeatable differences between the sexes is the toy preferences of children. On average, young boys prefer male-typical toys like trucks, blocks, and toy soldiers, while young girls prefer dolls and kitchen equipment. This difference shows up very early in childhood and holds across societies worldwide."
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Sex Differences Above the Neck (TLDR: they are real & important)
"We should let people be themselves, but in a world where both sexes have equal opportunities and where sex differences aren’t socially harmful. Given the copious data that [@SteveStuWill] presents, who can object to this path?"
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A Billion Years of Sex Differences: Innate or Learned?
The Nature and Nurture of Self-Control
Self-control is around 60% heritable - that is, genes explain roughly 60% of the differences between individuals in their levels of self-control.
Show more
Self-Control as a Performance-Enhancing Drug
Self-control is an all-purpose good like IQ: It predicts health, wealth, and all things good.
Sex Differences Above the Neck: A review of Steve Stewart-Williams's new book A Billion Years of Sex Diffferences, by Jerry Coyne @WEITyoutube
