Research done in Israel suggests the a generous personality has a a genetic component.
203 people took part in an online task in which they could either keep or give away money.
Gene tests showed people who had certain variants of a gene called AVPR1a were on average nearly 50 percent more likely to give money away.
The gene AVPR1a plays a key role in allowing a hormone called arginine vasopressin to act on brain cells. Vasopressin, in turn, has been implicated in social bonding.
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