But there is also a huge random effect that rains down on even the best parenting efforts. You may have also known the opposite instance, where a child succeeds despite his parents’ worst intentions and habits.
Recall for a moment the two boys, who were described in chapter 5. The white boy who grew up outside Chicago had smart, solid,encouraging, loving parents who stressed education and family. The black boy from Daytona Beach was abandoned by his mother, was beaten by his father, and had become a full-fledged gangster by his teens. So what became of the two boys?
The second child, now twenty-eight years old, is Roland G. Fryer, Jr., the Harvard economist studying black underachievement.
The white child also made it to Harvard. But soon after, things went badly for him. His name is Ted Kaczynski.
Steven D. Levitt & Stephen J. Dubner, Freakonomics: A Rogue Economist Explores the Hidden Side of Everything, (2005)