Latter-day Saints have said that various Old Testament and New Testament scriptures, including teachings of Christ himself, prophesy of this "falling away" or "apostasy." Thus, Latter-day Saints refer to the "restitution of all things" mentioned in and claim that a restoration of all the original and primary doctrines and rites of Christianity was necessary. Adherents believe that important historical events such as the Protestant Reformation and the establishment of the United States Constitution, which explicitly allows for freedom of religion in its First Amendment, were necessary antecedents to the restoration.