Nation of Beancounters

The kindness of strangers

Posted in Uncategorized by Navin Kumar on November 12, 2012

I like to think that it’s basic human nature, but Ben Casnocha has another, plausible theory:

The puzzle that is being altruistic and cooperative when it does not serve our self-interest. Why do humans over-tip to a waiter they’ll never see again? Why are people nice to strangers?

Because life is about succeeding in the “repeated games” that are interactions with friends, family, and co-workers. In those games, altruism pays. It pays to be generous, to do favors, to go out of our way–we will see those people again, and the altruism may come back to help us. So, when we are in a “single shot game” — for example, deciding on how much to tip the waiter at the diner on the side of the road in a city far away from home — this cooperative instinct spills over. Our moral intuitions spring from the repeated games that matter most and we inadvertently channel them to all games/situations. We forget when we’re in a one shot game; we forget we could get away with leaving no tip and it not harming us in the slightest. We forget, that is, until we start to think hard about what the tip should be.

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