QUOTE : Congratulations, now you know the single reason why the world is the way it is. You see the problem right away—everything we do requires cooperation in groups larger than a hundred and fifty. Governments. Corporations. Society as a whole. And we are physically incapable of handling it. So every moment of the day we urgently try to separate everyone on earth into two groups—those inside the sphere of sympathy and those outside. Black versus white, liberal versus conservative, Muslim versus Christian, Lakers fan versus Celtics fan. With us, or against us. Infected versus clean. “We simplify tens of millions of individuals down into simplistic stereotypes, so that they hold the space of only one individual in our limited available memory slots. And here is the key—those who lie outside the circle are not human. We lack the capacity to recognize them as such. This is why you feel worse about your girlfriend cutting her finger than you do about an earthquake in Afghanistan that kills a hundred thousand people. This is what makes genocide possible. This is what makes it possible for a CEO to sign off on a policy that will poison a river in Malaysia and create ten thousand deformed infants. Because of this limitation in the mental hardware, those Malaysians may as well be ants.