The Social Gospel movement peaked in the early 20th century, but scholars debate over when the movement began to decline, with some asserting that the destruction and trauma caused by the First World War left many disillusioned with the Social Gospel's ideals while others argue that the war stimulated the Social Gospelers' reform efforts. Theories regarding the decline of the Social Gospel after the First World War often cite the rise of neo-orthodoxy as a contributing factor in the movement's decline.