"Self-interest and society’s interests are generally symbiotic: more than anything else, it is pursuit of self-interest that motivates people to push themselves to do the difficult things that benefit them and that contribute to society. In return, society rewards those who give it what it wants. That is why how much money people have earned is a rough measure of how much they gave society what it wanted - NOT how much they desired to make money." -- Ray Dalio, Bridgewater Associates