I recently joined Donal O’Doherty on his Collective Wisdom podcast to discuss my new book, A Billion Years of Sex Differences.
We explored what science tells us about psychological differences between men and women, where those differences come from, and why the topic has become so politically charged.
Here’s some of what we discussed:
The largest sex differences in our species, and why most psychological differences are much smaller
Why men and women are both choosy about long-term partners
Mutual mate choice and human equivalents of the peacock’s tail
Sex differences in STEM and whether they’re necessarily a problem
Dating apps, incels, and evolutionary mismatch
Whether there’s any such thing as objective morality
You can watch the full episode on Donal’s Collective Wisdom YouTube channel.
If you want to dive deeper into the issues we discussed, you can buy a copy of A Billion Years of Sex Differences here.
If you want to check out more of my podcast appearances, you can find them here.
Follow me on Twitter/X for more psychology, evolution, and science.
Coming Soon to The Nature-Nurture-Nietzsche Newsletter…
How I Write: My Top Tips for Writing Non-Fiction That People Want to Read
Sex Differences in Cognitive Abilities
How Some Dinosaurs Evolved Primate-Level Intelligence
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Steve
Related Reading from the Archive
12 Things Everyone Should Know About Evolutionary Psychology
This is the latest post in my “12 Things Everyone Should Know” series. You can access the full collection here.
A Billion Years of Sex Differences
I recently gave a professorial lecture at my university, focused on some of my theoretical work on the evolution of human sex differences. The following is a lightly edited transcript of the lecture.
The Truth About Sexism in Science
It’s an idea so widely accepted that we rarely think to question it: Women face rampant discrimination in STEM fields, while men coast along on a cushion of unearned privilege. You’ll hear this claim echoed everywhere, from the most prestigious scientific journals to the pages of





