Tutorial # 2. Why Be Moral. The Immoralist Challenge. Discussion Questions

After having read Plato's The Republic, book 2, selection: 357a-367e (reprinted as ‘The Immoralist’s Challenge’ in Ethical Theory), think about these questions.
NOTE you can find an HTML version of The Republic @ The Perseus Digital Library

• Is our "duty" always identical with our self-interest. Why?
• Do we always know what our self-interest is?
• Is our self-interest determined by what we want?
• Give examples of "just behaviour". Is justice good in and of itself?
• Does being moral really serve our self-interest?
• What is good about being just, if others mistreat you because of your reputation?
• What should we do (and do we usually do in fact) when our duty conflicts with our self-interest?
• Are we always motivated by self-interest?
• Is there anything worthwhile in itself - regardless of its consequences?
• Do we have a natural tendency to be just (even when nobody can see us)?
• Is justice a convention?