"A decade has fully passed since the outbreak of the eventful controversy which has divided the Lutherans of North America into two camps. Dr. Walther showed already in the years of 1864—70, a leaning to the Calvinistic doctrines… The controversy itself broke out first in the year 1872, when Lehre und Wehre, the organ of the Missourians, (p. 205) directed a sharp attack upon Philippi of Rostock, accusing him of Synergism on account of his treatment of the doctrine of conversion in his Dogmatics.
Then it was that the theologians of the Iowa Synod (the Profs. Fritschell) raised a protest against the teachings of Dr. Walther… in consequence of which the Missourians charged them not only with Synergism in general, but with "Gross Synergism." Since that time the violence of the controversy has increased from year to year, and in the latter years of the past decade has produced such extreme excitement, and such a complete separation of all the Lutheran elements of the west, that the Synodical Conference previously under the control of Missouri, has been dashed into ruins." — Prof. Otto Zöckler