Here is the number one predictor of the success of your kid. And no, it's not what most parents think: not IQ, not grades, and not money. There's actually a 75-year Harvard study called the Harvard Grant Study that tracked children from childhood into their 70s and 80s. They followed thousands of kids to see what factors predicted success, happiness, health, and well-being. What they found might shock some people. One of the best predictors of future success was whether the kid did chores or not