How is it that the history of the central methodology of the American church has remained largely ignored, unprobed, and untold? For two hundred years it was the routine of American Evangelicalism to give an altar call at the end of church services. Many people may think they know the history of the altar call. They know is started around the time of The Second Great Awakening camp meetings and they may connect it in some manner to Charles Finney. And yet there has been a gaping hole in American church history regarding the foremost evangelical methodology. This invigorating new history of the altar call fills that hole, describing the cultural and theological context out of which it was born, the individuals who systematized it, and the lasting results that persist in the present day.