Dean Spears and Michael Geruso are economists, demographers, and associate professors at the University of Texas at Austin. Their book After the Spike: Population, Progress, and the Case for People is out on July 8, 2025.

In this week’s conversation, Yascha Mounk, Dean Spears and Michael Geruso explore whether a higher population really impacts climate change, why more people on the planet means more geniuses, and how we can avoid depopulation.

Podcast production by Jack Shields and Leonora Barclay.

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