Ethical egoism: acting egoistically doesn"t mean you stomp on the interests of others; it means being nice to others because people may be nice to me if i"m nice to them what goes around, comes around . Being nice is in my self interest so that"s why i do it. Is internally incoherent; doesn"t make sense by its own criteria: universal egoism: everyone ought to look after their own self- interests and ignore any interests that come into conflict; yours over anyone else"s. Individual egoism: one should look after their own self-interest; everyone else should do whatever they want. It is good for me to look after my own self interest: he notices that ethical egoism cannot be preached; you can"t convince other people of it. Summary of medlin"s argument: ethical theory thinks that everyone should follow it and tries to convince people of it, ethical egoism cannot convince anyone else of its universalism.