Overcoming adversity is what produces character. And character, even more than IQ, is what leads to real and lasting success.
Maybe Malcolm Gladwell?
These results posed, for Mr. Heckman, a confounding intellectual puzzle. Like most economists, he had always believed that cognitive ability was the single most reliable determinant of how a person's life would turn out. Now he had discovered a group—GED holders—whose good test scores didn't seem to have any positive effect on their eventual outcomes.
I'm glad that economists have the economy running so smoothly they have go looking for other puzzles to solve, even if they have to be satisfied with questions any high school guidance counselor would be happy to answer.