The idea that your idea is your self-interest is somehow opposed to other people’s, or if you maximize your self-interest, that you’re not operating in the best interests of other people is predicated on a poor idea of what constitutes your self-interest, because you’re not separate in any real sense from other people. You’re maybe not separated from everything in some real sense.
Jordan Peterson
For more, see Why Being Selfish Is Stupid (Jordan Peterson).