Prejudice feels like an ugly relic, a stubborn stain on modern society. We condemn it loudly, yet it persists, bubbling beneath the surface or erupting openly. Understanding why we discriminate isn’t about excusing it, but about disarming it. The roots lie deep within fundamental aspects of human psychology, making prejudice less an anomaly and more a tragically common potential within us all. One core driver is our innate tendency towards categorization . Our brains are pattern-seeking machines, constantly sorting the overwhelming complexity of the world into manageable boxes: safe/dangerous, familiar/strange, like us/not like us. This “us vs. them” distinction, often called social categorization, served an evolutionary purpose. Quickly identifying potential allies or threats within our ancestral “in-group” could mean survival. Today, however, this instinctive sorting easily hardens into rigid stereotypes applied to vast, diverse “out-groups.” We reduce individuals to simpl...