This looks at a history of 19th century Christian movements in America. From the preface:

“In an earlier volume, I recited the history of the Disciples of Christ under the title, Religion Follows the Frontier. The phrase was designed to emphasize the fact that this religious movement was born under pioneer conditions on the American frontier, in the days when the frontier was just crossing the Alleghenies, that much of its formative thinking followed patterns congenial to the frontier mind, and that its early expansion kept pace with the westward wave of migration.

Since that book is now out of print, while interest in the theme is increasing, it has seemed desirable to rewrite the history. If this were merely a sequel to the other, I would call it Growing Up with the Country.

It remains true that the pioneer beginnings must be remembered and understood if the initial motives and methods of the Disciples and the processes of their growth are to be understood. But important as the frontier is, as a fact in the history of the United States and of every phase of culture in the Middle West, an equally significant fact is that, as the frontier rolled westward, it left behind it a widening area in which pioneer conditions no longer prevailed. As the country was growing by the expansive drive of which the frontier was the cutting edge, it was also growing up, both behind and on the frontier. The process of maturing is as significant as that of expanding.

Since the present purpose is to survey the history of the Disciples through both of these phases, I have resisted the allurement of this second title and am giving the book a name which includes both; for the 6movement is distinctively American, and every American movement which began in pioneer days and has lived through the cycles of American life until now has both followed the frontier and grown up with the country.

As to the future—I am only a historian, not a prophet. But I shall be disappointed if this record of the past does not leave with the reader an acquaintance with the essential data upon which, using his own judgment and imagination, he will be disposed to project the curve of a future development far beyond any present attainments in promoting the ends for which the Disciples of Christ came into existence—the unity and purity of the Church, a reasonable and practical religion, and the enrichment of life through fellowship in the grace of our Lord Jesus Christ.”