'Grit' Is More Important Than IQ - Business Insider

What's the best predictor of success? IQ, talent, socioeconomic status, luck?

Nope. It's 'grit,' more than anything else.

Through her research at the University of Pennsylvania —and firsthand experience teaching in New York City's public schools —psychologist Angela Duckworth has found that the ability to withstand stress and move past failures to achieve a goal is the best indicator of future success.