I’m a psychologist and neuroscientist, and my whole career, I’ve studied the sunny side of human nature. My lab and I have found that giving away money activates similar parts of your brain as eating chocolate, and that helping other people through their stress calms our own. Our punch line is clear: there is good in us, and it does good for us.

https://www.ted.com/talks/jamil_zaki_how_to_escape_the_cynicism_trap