Long ago Mr. Clemens demonstrated in his essay “What is man?” that every one of us acts at all times in his own interest. Once you understand this, i… - Robert A. Heinlein

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Long ago Mr. Clemens demonstrated in his essay “What is man?” that every one of us acts at all times in his own interest. Once you understand this, it offers a way to negotiate with an antagonist in order to find means to cooperate with him for mutual benefit. But if you are convinced of your own “altruism” and you try to shame him out of his horrid selfishness, you will get nowhere.