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Why do some extremely wealthy people often come off as so heartless? They're conditioned that way. And now there's science to prove it:

A series of studies published in Psychological Science found that money can influence responses to both emotional and physical pain. Specifically, the researchers found that handling physical money makes a person less sensitive to physical pain and reduces the distress of being excluded in social situations. In other words, wealth makes you as hard and cold as steel.

Remember that the next time you hear about someone like Donald Trump refusing to give money to panhandlers on principle. It's not his fault. He can't help himself.

Why the Rich Are so Cold [WSJ]