Do cranky people really die younger than pollyannas?
Time - 02/16/2017
But if you look at the scientific data, it turns out that most older people are not actually crankier than younger people–it’s just that they don’t play by the same social rules. When you’re younger, being nice and presenting yourself positively can gain people’s good favor down the line, says Derek Isaacowitz, a psychology professor at Northeastern University, but that ceases to be a major motivator as you age. That’s why social scientists like to point out that outward expressions of grumpiness may just be a sign that someone is unconcerned with social niceties–as opposed to being hardened and unhappy.