If Jesus is the Messiah in Islam, why is Muhammad more important?

[Basheer]

Please read the article "The 100: A Ranking of the Most Influential Persons in History." written by Michael H Hart an American astrophysicist. He is a Christian. He is a Professor of astronomy, physics and the history of science. He says, "My choice of Muhammad to lead the list of the world's most influential persons may surprise some readers and may be questioned by others, but he was the only man in history who was supremely successful on both the religious and secular level."

Both Jesus and Mohammed (peace be upon them) were prophets and messengers sent by Allah. Mohammed (pbuh) is the final and seal of the prophets. This gives more importance to him.