Do we study the deep past only to justify our present actions toward those we deem less “civilized”? Are humans fundamentally good and altruistic or mean and self-serving? Is “human nature” warlike or peaceful? Stan’s guest this week is author and historian Stefanos Geroulanos of New York University, discussing all of these issues from his new book, The Invention of Prehistory: Empire, Violence, and Our Obsession with Human Origins, published in 2024 by Liveright.