Hasn't race always been with us? Ancient people stigmatized 'others' based on language, custom and religion, but not physical differences. This episode traces the rare concept to the European conquest of the Americans, including the development of the first labour 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 superiority. By the mid-19th century, race had become the 'commonsense- wisdom' of white America, explaining everything from individual behaviour to the fate of societies. The Story We Tell reveals how social inequalities came to be disguised as 'natural.'