Sure other people have affected the physical world (not better than Jesus though.) For example, just look at the millions of people who died in the concentration camps during WWII. They died for their religion. They died because they still believed that someone would save them. Now, who has had that big of an impact on this world except Jesus, where someone would lay down his life for what he/she believes in? Also, in Columbine, I heard a story about how one of the killers asked a student if they believed in God & they said yes. Then one of the kids told them that he said hi & shot them. Now I ask you, who can you name that has such an impact on people like Jesus, where people will die for Him, just as He died for us!?