I eat liberal pussies for breakfast, and I am not saying that "evil doesn't exist, it's all in your point of view." Evil DOES exist, I just don't see it with Anikin. He saw both the Jedi and Palpatine as selfish and power hungry, they were both evil in his eyes... He chose the better option because he thought he could save his wife if he helped Palpatine. I would have made the exact same choice, and I am not evil. My GF agrees, Anikin is a victim, forced into evil behavior with good (but selfish) intentions.
As far as world conflict goes, yeah there IS evil sometimes, but most of the time both sides think they are right.