R. Saadia Gaon (882-942) was unquestionably one of the most important if not the most important medieval Jewish thinker. He dealt with biblical exegesis, philosophy, grammar, poetry, prayer, and Halakha, and in many of these fields he is considered an innovator and a trailblazer, paving new paths for his followers. Many of the sages who lived after him cited from his writings. He served as head of the Academy of Sūra, Babylon, but the impact of his works was felt in all generations who lived and followed. This study seeks to describe and analyze R. Saadia Gaon's life, his public enterprise, his works, and his influence on the generations after him.