" Self-control is ultimately about much more than self-help. It’s essential for savoring your time on earth and sharing joy with the people you love. Of all the benefits that have been demonstrated in Baumeister’s experiments, one of the most heartening is this: People with stronger willpower are more altruistic. They’re more likely to donate to charity, to do volunteer work, and to offer their own homes as shelter to someone with no place to go. Willpower evolved because it was crucial for our ancestors to get along with the rest of the clan, "

― Roy F. Baumeister , Willpower: Rediscovering the Greatest Human Strength