“The Kahneman and Tversky partnership was extraordinary in terms of its scientific impact—they are the Lennon and McCartney of social science—and even now, when joint work is increasingly common in academia, enduring teams like theirs are extremely rare. In Lewis’s account, the relationship between Kahneman and Tversky was as intense as a marriage.”

http://www.newyorker.com/books/page-turner/the-two-friends-who-changed-how-we-think-about-how-we-think