Otto Rank, one of Sigmund Freud's closest colleagues, was an Austrian psychologist who sought to challenge how we think about rationality and the weight it really takes on human behavior and decision-making. An author of multiple books, he argued for quite radical positions that caused a significant break from his colleagues, including his theory that the trauma one experiences during birth is the root of human suffering.
Another prolific theory that Rank issued is that humans actually behave quite irrationally and retrospectively use rational language to explain their behavior. Curious to know more? Click on.