Psychologist Steve Stewart-Williams’ third book about evolutionary psychology is A Billion Years of Sex Differences: How Evolution Shaped the Minds of Men and Women.

@SteveStuWill: THREAD: A fascinating new paper argues that many of the stresses and strains of modern life are due to a mismatch between the world we evolved in and the world we inhabit today. The…

Rock stars, coin flips, and roads not taken

There's a lot of IQ misinformation out there

My latest appearance on the Modern Wisdom podcast, plus a new review and a new interview about A Billion Years of Sex Differences

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Steve Stewart-Williams addresses misconceptions about evolutionary psychology, refutes charges of pseudoscience, and discusses the political and ethical risks of denying biological sex differences, ad...

The evidence for innate sex differences has been accumulating for decades. Steve Stewart-Williams's new book is a welcome inventory.

...plus a new review in Quillette and my appearance on the Michael Sartain Podcast

Books editor Mark Broatch and Listener reviewers on 100 must-read titles.

Conceptual metaphor theory supposes that metaphor underlies much of human understanding. The implicit association test (IAT) has recently been used to quantify metaphoric alignments, like black and wh...

How do men and women differ? Where do these differences come from? And how do they shape modern life? Evolutionary psychologist Steve Stewart-Williams tells us more.

A psychologist wades into controversial territory in this counterintuitive study of nature, nurture and gender

YouTube video by The Dissenter

YouTube video by The Dissenter

Same-sex sexual orientation is biological but largely non-genetic

The nature and nurture of sex differences in sexual psychology

The Nature-Nurture-Nietzsche Linkfest for February 2026

...and reflections on my second year on Substack

Why evolution is the greatest show on Earth

'Tis the season to get 20% off a paid subscription to The Nature-Nurture-Nietzsche Newsletter

The people have spoken

Five reasons to be skeptical

The fifth excerpt of my forthcoming book, A Billion Years of Sex Differences

Surprising links between personality, success, and everyday life

The fourth installment of the first chapter of my forthcoming book, A Billion Years of Sex Differences