Scott Adam's (creator of Dilbert) had a little Q&A session on his blog.

Q. Who, out of any person, would do the best job of dictator with total control of the world, and please give a real response.

A. Bill Gates. He’s rational, experienced, and has a good track record of helping the disadvantaged through his charitable trusts.

I thought about it for a while... and I think I agree with him. I don't really know that much about Mr. Gates, but what I do know leads me to agree with Mr. Adams.