Already into their careers, the two would begin collaborating in the 1960s. Tversky was pragmatic relying on mathematics and challenging accepted thoughts while Kahneman churned out ideas. Tversky was also known for having a messy office while Kahneman’s was as well organized as any.

Before the two published their works, many experts believed that the human mind was rather rational. Afterward, we came to understand on illogical we could be. One such example being that people would rather avoid regret than attain happiness.

Their findings would on to be felt in sports, the medical field, transportation, and finance. Lewis excels at both telling a human story while also illuminating the research that made Tversky and Kahneman worth studying in the first place