1. Muhammad is considered the most influential person in history by Michael H. Hart and others due to his influence on both religious and secular levels through establishing Islam. 2. Historians and writers from various backgrounds, such as George Bernard Shaw and Thomas Carlyle, have praised Muhammad for the strength and vitality of Islam as well as his remarkable life and achievements. 3. Muhammad is credited with transforming societies in the Arabian Peninsula through establishing a moral code and disciplined living in just 23 years through his message of Islam.