Yet, if perseverance is central to Gladwell’s outliers, it’s hardly the sole reason for their success. Family background, opportunity, culture, landing at the right place at the right time, the over-all state of the economy—all these elements, operating at once, allow some talented people to do much better than other talented people. Gladwell provides the history and context of successful lives. Duckworth—indifferent to class, race, history, society, culture—strips success of its human reality, and her single-minded theory may explain very little. Is there any good football team, for instance, that doesn’t believe in endless practice, endurance, overcoming pain and exhaustion? All professional football teams train hard, so grit can’t be the necessary explanation for the Seahawks’ success.