The second episode of the series, "Race--the Power of Illusion," traces the race concept to the European conquest of the Americas, including the development of the first slave system where all slaves shared a physical trait--dark skin. Ironically, it wasn't until slavery was challenged on moral grounds that early prejudices--emboldened by the need to defend slavery in a nation that professed a deep belief in freedom--crystallized into a full-blown ideology of white supremacy, characterized by the eugenics movement. By the mid-19th century, race had become the "commonsense" wisdom of white America, explaining everything from individual behavior to the fate of whole societies. "The Story We Tell" reveals the startling story of how social inequalities came to be disguised as "natural".