If John List’s research proves anything, it’s that a question like “Are people innately altruistic?” is the wrong kind of question to ask. People aren’t “good” or “bad.” People are people, and they respond to incentives. They can nearly always be manipulated—for good or ill—if only you find the right levers. So are human beings capable of generous, selfless, even heroic behavior? Absolutely. Are they also capable of heartless acts of apathy? Absolutely.

