Abstract
Arthur Jensen (1923-2012) was one of the most prolific and well-cited psychologists of the twentieth century. We have two pictures of Arthur Jensen. The first is the meticulous and careful psychologist crowned “a king among men” by his colleagues. The second Jensen repeatedly voiced eugenicist concerns about the genetic deterioration of society. The second Jensen lent his name to neo-Nazi organizations and figures and published research with racial segregationists. I argue that there is only one Arthur Jensen. His political allies and affiliations with reactionary and racist figures are embedded in his psychological work.