When people tell you that Universalism is a recent “invention,” read them this from Origen’s work, Of Principles, written around 230.
The end of the world, then, and the final consummation, will take place when every one shall be subjected to punishment for his sins; a time which God alone knows, when He will bestow on each one what he deserves. We think, indeed, that the goodness of God, through His Christ, may recall all His creatures to one end, even His enemies being conquered and subdued. For thus says holy Scripture, “The Lord said to My Lord, Sit Thou at My right hand, until I make Thine enemies Thy footstool.” And if the meaning of the prophet’s language here be less clear, we may ascertain it from the Apostle Paul, who speaks more openly, thus: “For Christ must reign until He has put all enemies under His feet.” But if even that unreserved declaration of the apostle do not sufficiently inform us what is meant by “enemies being placed under His feet,” listen to what he says in the following words, “For all things must be put under Him.” What, then, is this “putting under” by which all things must be made subject to Christ? I am of opinion that it is this very subjection by which we also wish to be subject to Him, by which the apostles also were subject, and all the saints who have been followers of Christ. For the name “subjection,” by which we are subject to Christ, indicates that the salvation which proceeds from Him belongs to His subjects, agreeably to the declaration of David, “Shall not my soul be subject unto God? From Him cometh my salvation.”