Biologically Primary vs. Secondary Learning With David Geary

Biologically Primary vs. Secondary Learning With David Geary

April 15, 2026 · 57 min

About this episode

Drew Perkins interviews David Geary about the distinction between biologically primary and secondary knowledge in learning.

Drew Perkins talks with David Geary, a cognitive developmental and evolutionary psychologist and Curator's Professor in the Department of Psychological Sciences at the University of Missouri. They dive into the foundations of evolutionary educational psychology, exploring how our evolutionary history shapes the way we learn today and why certain types of knowledge are fundamentally more difficult to acquire than others. Links & Resources Mentioned In This Episode Have some feedback you'd like to share? You can email me at drew@thoughtstretchers.org . If you enjoyed this episode, please share it and leave a review wherever you're listening. The core of the conversation centers on Geary's groundbreaking distinction between biologically primary and biologically secondary knowledge. Primary knowledge includes skills like spoken language, social navigation, and basic folk physics, which humans have evolved to acquire effortlessly and instinctively. In contrast, secondary knowledge—such as reading, writing, and advanced mathematics—is a recent cultural invention that requires explicit instruction and sustained effort because our brains are not "wired" for it by default. Drew and David…

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