The Biology Of Altruism: Good Deeds May Be Rooted In The Brain

Four years ago, Angela Stimpson agreed to donate a kidney to a complete stranger. "The only thing I knew about my recipient was that she was a female and she lived in Bakersfield, Calif.," Stimpson says. It was a true act of altruism — Stimpson risked pain and suffering to help another. So why did she do it? It involved major surgery, her donation was anonymous, and she wasn't paid.

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