There are geniuses who work on their own. Together, we are exceptional.' Daniel Kahneman and Amos Tversky met in war-torn 1960s Israel. Both were gifted young psychology professors: Kahneman a rootless son of holocaust survivors who saw the world as a problem to be solved; Tversky a voluble, instinctive blur of energy. In this breathtaking new book, Michael Lewis tells the story of how their unlikely friendship became one of the greatest partnerships in science—until, tragically, it started to unravel. Their ideas, shows Lewis, helped shape our world—revolutionising everything from Big Data to medicine, money to sport—and changed humankind's view of its own mind.