Monkey Business | Interview: Jonathan Leaf

Jonathan Leaf, author of *The Primate Myth*, challenges the widely accepted idea that humans are fundamentally similar to chimpanzees and other primates, arguing instead that recent scientific research reveals profound anatomical, behavioral, and neurological differences. He contends that humans are not even primates by the strict biological definition—lacking flat nails and prehensile feet—and are more accurately understood as domesticated herd animals, akin to wolves, dolphins, and elephants. This shift in perspective, he argues, explains uniquely human traits like complex cooperation, language, and identity formation—none of which exist in primates. He highlights that humans are the only species to commit suicide, have low rates of false paternity (indicating natural monogamy), and engage in large-scale collective violence not from innate aggression but from obedience and ideology. The book’s central thesis—that our behavior is shaped more by culture and institutions than by primate instincts—has sparked resistance from established primatologists, many of whom have refused to debate him. The conversation also touches on the dangers of herd mentality, the myth of authenticity, and the malleability of human nature, suggesting that while we are prone to manipulation, we can also be guided toward better outcomes through the right systems.