All of the available information and resources, including his life, shows that his mission was universal and eternal. Such men as Alexander the "Great," the Roman Caesars, Napoleon, Hitler, and the imperialists of Europe, Russia, and America all sought extensive dominion for the sake of worldly power and authority. But when Prophet Muhammad ordered his followers to spread Islam all over the world, his aim was to remove the obstacles preventing human happiness in this world and the next, to prevent them from going to Hell, and to enable them to regain their lost values and inherent purity. As the final Messenger, always under His Guidance and Command, his life was a struggle to spread the light of Islam as far as possible so that others might hear the Divine Message. Certainly he succeeded.