In 1962, Victor and Mildred Goetzel published a reveling study of 413 famous and exceptionally gifted people. The study was called Cradles of Eminence. These two researchers spent years trying to understand the source of these people's greatness, the common threat which ran through all of these outstanding people's lives. The most outstanding fact was that almost all of them, 392, had to overcome very difficult obstacles in order to become who they were. Their problems became opportunities instead of obstacles.