date Posted: May 13, 2008 6:10 AM
Lucas took a lot from history. The uniforms the Imperial officers wore were patterned off of the Nazi outfits. Obviously, the concept of Empire, and the uniforms of the Imperial Royal Guards came from the Romans.
I think, specifically for the Emperor, Lucas used Hitler and the forthcoming Anti-Christ as models. Hitler believed, and I'm sure the Anti-Christ does/will too, that if you tell a lie long enough people will accept it as truth. You can see this illustrated in the Prequel Trilogy.