@Paggos,
Paggos;74066 wrote:
2: Why shouldn't philosophy be in metaphysics or any other science? Isn't philosophy a branch of social sciences?
I'd put it the other way around: metaphysics should not be in philosophy. I think it was David Hume who first said that metaphysics was meaningless, claiming that all books on metaphysics should be "condemned to the flames" or something like that.
This article covers metaphysics and why metaphysics, however the term is understood, is impossible. It will probably prove to be a challenge for someone new to philosophy (as it challenges me even now when I re-read it), but it is a wonderful article.
Metaphysics (Stanford Encyclopedia of Philosophy)
Inwaggen, the author, also has a little book called Metaphysics that covers the same material in more depth, and might be useful to you if you can find it. I have a copy around here somewhere; it really is a great little introduction to metaphysics, even though the author has a definite bias.
Paggos;74066 wrote:6: How did the republic by Plato really influence state governments? Did it aspire other regions to take up his ideals on a "perfect" government?
Plato's Republic is one of the most influential political works in western thought, and one of the most influential western works of any genre (the Republic covers more than just politics). Essentially everything on politics that came after this work owes a debt to Plato's classic.