Dooku left the jedi order becuase he thought it was corrupt. He then joined the sith because of his ambitious desires to become better than everyone else. "I have become more powerful than any jedi". He also beecame a sith to help build a new Republic because he didnt think the old one was working. So from his point of view he was doing good, but in reality he was creating a war and killing millions of people.
I never did get that...in AOTC when talking to Kenobi in prison...the whole "join me, and we can destroy the Sith" speech.
Was that indended to be a ploy (take Kenobi as an apprentice and overthrow Sidious), or did Dooku actually think he could overthrow Sidious and destroy the Sith (say if he also gave up his lordship)?
Did Lucas ever say anything on what he intended?
It was really referring to comments like "If you are not my friend, you are my enemy," that kind of thing.
But nevermind all that as for the wider cosmology. George Lucas, and Star Wars itself, is very clear- that there is good and evil, white hats and black hats, and people are clearly one or the other. Your comment may be so about real life, Alliance, but not in Star Wars- no shades there.