The following is from Michael Hart's book and lists Prophet Muhammad as the most influential man in History. A Citadel Press Book, published by Carol Publishing Group.

Ranking of the twenty from the list of 100:
  1.     Prophet Muhammad
  2.     Isaac Newton
  3.     Jesus Christ
  4.     Buddha
  5.     Confucius
  6.     St. Paul
  7.     Ts'ai Lun
  8.     Johann Gutenberg
  9.     Christopher Columbus
  10.     Albert Einstein
  11.     Karl Marx
  12.     Louis Pasteur
  13.     Galileo Galilei
  14.     Aristotle
  15.     Lenin
  16.     Moses
  17.     Charles Darwin
  18.     Shih Huang Ti
  19.     Augustus Caesar
  20.     Mao Tse-tung
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 levels. Of humble origins, Muhammad founded and promulgated one of the world's great religions, and became an immensely effective political leader. Today, thirteen centuries after his death, his influence is still powerful and pervasive.
- Michael Hart...