1.  What is the difference between psychological and ethical egoism?

2.  What are the major arguments against ethical egoism?

3.  Why is it paradoxical to claim that psychological egoism "supports" ethical egoism?

4.  What is Butler's major argument against egoism?

5.  What is Ayn Rand's argument in favor of ethical egoism?

6.  Is Hobbes arguing for ethical egoism in his Leviathan?