The Altar Call is a thorough examination of the public invitation practice within Christian evangelism. In addition to giving a comprehensive historical background that spans three continents, The Altar Call also poses the following question: If John Wesley, George Whitefield, and Jonathan Edwards are regarded as the great figures of modern evangelicalism, why did none of these important leaders practice the invitation system that became so important in so many later evangelical groups? This important study will be of interest to both religious scholars and lay people, who are curious about the antecedents, development, and current use of the altar call.