How is psychological egoism supposed to provide

support for an argument for ethical egoism? 

What is

one problem for this argument?


 Summarize the arguments regarding the consistency or inconsistency of ethical egoism.


. In what sense does the argument for ethical egoism based on economics support not egoism but

utilitarianism—in other words, the view that we

ought to do what is in the best interest of all or the

greatest number?