Imagine yourself betting on the long-term survival of two types of people. One is the classic egoist, focused and ruthless. The other is more selfless, willing to help fellow humans without any evident gain. Who will be more successful?
For anyone steeped in the prevailing thinking of our era, the obvious winner is the egoist. Darwinian evolution and the lore of modern capitalism tell us that only fierce competitors survive. Altruists, the game theorists teach us, are mathematically incapable of achieving dominance. Acts of cooperation are either errors born of ignorance or purely selfish strategic moves aimed at getting something of greater value.
The idea that biological competition favors the greedy, creating the ultrarational and incentive-driven Homo economicus, remains at the core of the models economists use to understand the world. It is taught to millions of students and informs the decisions of the planet's most powerful policymakers.
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