Lewis Sperry Chafer (1871-1952) was a prominent American theologian and a key figure in early 20th-century evangelical Christianity. He is best known for his work in systematic theology and his founding of Dallas Theological Seminary, where he served as the first president. Chafer's theological contributions are significant in the realm of dispensationalism, a framework that divides biblical history into distinct periods or "dispensations" and emphasizes a literal interpretation of Scripture. Chafer's scholarship, including his influential book Satan, reflects his deep engagement with Christian doctrine and biblical studies. His work on Satan and spiritual warfare provides a detailed examination of the role of the Devil in Christian theology, exploring themes of evil, temptation, and moral struggle. Chafer's emphasis on the practical implications of theological beliefs for everyday Christian life is a hallmark of his approach. Throughout his career, Chafer was known for his rigorous scholarship and commitment to evangelical principles. His legacy endures through his writings, teachings, and the continued influence of Dallas Theological Seminary in shaping modern evangelical thought and biblical education.