1. Muhammad is considered the most influential person in history by Michael H. Hart and others due to his achievements in both religious and secular realms which transformed societies in just 23 years. 2. He established Islam, which was admired by thinkers like George Bernard Shaw for its vitality and ability to appeal across ages. 3. Historians like Lamartine recognized Muhammad's genius in achieving great purposes with small means and producing astounding results, influencing millions in his lifetime and founding both an earthly and spiritual empire.