The style of nondenominational Christianity that I think many of us are familiar with in the United States essentially developed under Dwight L. Moody, who as a preacher felt it was more important to save as many people as possible than to be bogged down in minor theological disputes. What Fitzgerald points out is that his style of American Christianity wasn’t really anything new, it wasn’t much different from the frontier Christianity that had a long history in rural America, but Moody had found a way to adapt to urban environments in a time when people were becoming very concerned about the vice, character, and impoverishment of the cities.