Haidt realized that he'd made a mistake when he thought that conservatives cared less about fairness than liberals; rather, they cared about different fairness. Liberals worried about the fairness of equality. Conservatives were animated by the fairness of proportion: Are people being rewarded according to the effort they put it? Haidt realized he would need a sixth moral foundation, one that would capture what these conservatives were talking about. "It was the fairness," writes Haidt, "of the Protestant work ethic and the Hindu law of Karma: people should reap what they sow."
-Megan McCardle, as excerpted from The Up Side of Down: Why Failing Well Is the Key to Success