The heresy of Americanism

Sponsors of "Vatican II Lives"

From the foregoing it is manifest, beloved son, that we are not able to give approval to those views which, in their collective sense, are called by some "Americanism." But if by this name are to be understood certain endowments of mind which belong to the American people, just as other characteristics belong to various other nations, and if, moreover, by it is designated your political condition and the laws and customs by which you are governed, there is no reason to take exception to the name. But if this is to be so understood that the doctrines which have been adverted to above are not only indicated, but exalted, there can be no manner of doubt that our venerable brethren, the bishops of America, would be the first to repudiate and condemn it as being most injurious to themselves and to their country. For it would give rise to the suspicion that there are among you some who conceive and would have the Church in America to be different from what it is in the rest of the world.

But the true church is one, as by unity of doctrine, so by unity of government, and she is catholic also. Since God has placed the center and foundation of unity in the chair of Blessed Peter, she is rightly called the Roman Church, for "where Peter is, there is the church." Wherefore, if anybody wishes to be considered a real Catholic, he ought to be able to say from his heart the selfsame words which Jerome addressed to Pope Damasus: "I, acknowledging no other leader than Christ, am bound in fellowship with Your Holiness; that is, with the chair of Peter. I know that the church was built upon him as its rock, and that whosoever gathereth not with you, scattereth." 

Testem Benevolentiae Nostrae
Encyclical of Pope Leo XIII promulgated on January 22, 1899.