Rational self-interested agents cannot join together in a functioning society—this could be one of the fundamental theorems in sociology. In a world where all individuals behave strictly rationally, armies would run away at the first shot (or would not even get together in the first place). Nobody would vote or pay taxes. IRS agents would accept bribes not to prosecute tax evaders, and then pass some fraction of that to the members of the Senate overseeing committee, to buy them off. The courts would make verdicts in favor of whoever can pay more, or has more power to intimidate the judges and
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