Charles Sheldon was an American author and minister, best known for his novel, "In His Steps," published in 1896. This book popularized the phrase "What would Jesus do?" and encouraged readers to consider their actions in light of Christian teachings. Sheldon’s work emphasized the importance of living a life of faith and service to others. In addition to his writing, Sheldon was a prominent figure in the Social Gospel movement, which sought to apply Christian ethics to social problems. He was also involved in various charitable activities and advocated for social reform, aiming to improve the lives of the less fortunate in society.