The Lord built His church ten days after His ascension. Since that time, man has adopted a "pick and choose” attitude toward His doctrine, following the points they like and decrying those they don’t like. That is the origin of denominationalism.
The author of this book states his purpose in writing this way:
By tracing up the origin of the various denominations-which an apostate church has spawned upon the world-and by locating the origin of all innovations from the fourth century down to the present, we have identified the church of Christ as established by the apostles.