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From our hunter-gatherer days, we humans evolved to be excellent throwers, chewers, and long-distance runners. We are highly social, crave Paleolithic snacks, and display some gendered difference resulting from mate selection. But we now find ourselves binge-viewing, texting while driving, and playing Minecraft. Only the collective acceleration of cultural and technological evolution explains this development. The evolutionary psychology of individuals - the drive for "food and sex" - explains some of our current habits, but our evolutionary success, Alex Bentley and Mike O´Brien explain, lies in our ability to learn cultural know-how and to teach it to the next generation. Today, we are following social media bots as much as we are learning from our ancestors. We are radically changing the way culture evolves. Bentley and O´Brien describe how the transmission of culture has become vast and instantaneous across an Internet of people and devices, after millennia of local ancestral knowledge that evolved slowly. Long-evolved cultural knowledge is aggressively discounted by online algorithms, which prioritize popularity and recency. If children are learning more from Minecraft than from tradition, this is a profound shift in cultural evolution.

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R. Alexander Bentley is Chair of the Department of Anthropology at the University of Tennessee and coauthor of I´ll Have What She´s Having: Mapping Social Behavior (MIT Press). Michael J. O´Brien is provost at Texas A&M - San Antonio and coauthor of I´ll Have What She´s Having: Mapping Social Behavior (MIT Press).

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