Mark Noll describes and interprets American Evangelical Christianity, utilising research by theologians, sociologists and political scientists, as well as the author's own historical interests, to explain the position Evangelicalism now occupies at the beginning of the new century.

Mark A. Noll is McManis Professor of Christian Thought at Wheaton College, Illinois, and the author and editor of many bestselling books and articles, including Turning Points: Decisive Moments in the History of Christianity, The Scandal of the Evangelical Mind, and A History of Christianity in the United States and Canada. His most recent book is Protestants in America. In 1998 he inaugurated the McDonald Family Visiting Chair in Evangelical Theological Studies at the Harvard Divinity School.