And back to the subject... And the question is: what haven't we argued? The "what's the best whay to rule a country" is a pretty wide subject, and probably too big...
I think my father found an interesting topic:
What is happiness? And how do you become happy? What are the main criterion for happiness? Is it owning a lot of money, having a lot of friends, being healthy, haveing a flourishing lovelife etc?