At last, research is catching up that great teacher whose brief but profound rabbinical career 2000 years ago could be summed up in the three words "love one another."

Today Nature magazine published the findings of researchers who studied the behavior of 100 Boston-area college students playing the game "Prisoner's Dilemma," which the researches describe as "a punishment-heavy version of the classic one-on-one brinksmanship game of prisoner's dilemma."

Common game theory has held that punishment makes two equals cooperate. But when people compete in repeated games, punishment fails to deliver, said study author Martin Nowak. He is director of the evolutionary dynamics lab at Harvard where the study was conducted.

"On the individual level, we find that those who use punishments are the losers," Nowak said his experiments found.

Those who escalate the conflict very often wound up doomed.

When faced with a nasty opponent, turning the other cheek and continuing to cooperate--or at least not handing out punishment--paid off more in the long run, the study found.

"It's a very positive message," said study co-author David Rand, a Harvard biology graduate student researcher. "In general, the thing that is most, sort of, rational and best for your own self-interest is to be nice."

Read the full story here.