Study: Happy people are selfish assholes.

Jerks, all of them. From New Scientist:

The Founding Fathers liked happiness so much they considered pursuing it an inalienable right – but maybe that wasn't such a good idea. Happiness seems to make people more selfish, the latest in a series of revelations suggesting it changes how you think – and not in a good way.

Psychologist Joe Forgas at the University of New South Wales in Sydney, Australia, who has led many of these studies, suggests that happiness's negative effects all stem from a cheery mood's tendency to lull you into feeling secure. This makes you look inwards and behave both more selfishly and more carelessly.

"People in a positive mood generally rely more on their own thoughts and preferences, and pay less attention to the outside world and social norms," says Forgas.