Hey! That is a really good question if he had stayed in charrge the world would be nothing like it is today. In my opinion I think everyone can make a difference by one decision at a time. One person can change things and make riples of water as far as the eye could see because they made the decision to not be sellfish, therefor they are a good person. but your question can one person really be important? Yes! they can if you believe they are important. It doesnt matter who sais what to you, Its what you believe. :)
Hope it solves your problem!!