Briefly evaluate Muhammad with historical facts.

Muhammad is the founder of Islam and the founder of Arab countries. He accomplished the dual mission of creating religion and establishing a unified country. He founded Islam and actively carried out missionary activities, which made the Arab nation move from dispersion to unity. This has formed a strong national unity with religious beliefs as the link. He established the first Arab country in history, which laid the foundation for his successors to expand Zhang Zhilu and form the Arab Empire. The country he founded and the Arab civilization he created had a far-reaching impact on the development of world civilization in the future.