The Prophet Muhammad has influenced the most people in HISTORY. He established Islam in 580 and now there 1-1.8 billion Muslims in the world. In only 1432 years Islam has become. The Prophet Muhammad spent 23 years establishing the religions has has influenced BILLIONS.

Nelson Mandela, for every thing he had to go through; and for everything he represents today.

It completely depends on what type of person you are and what you like. I would say William at the Battle of Hastings in 1066 and the battle plans when he came over and arranging the troops after that coming up with the Doomsday bookk is simply grand because we still have the census which is like it today