Bibliotheca Catholicaa library of libraries
Support
Summa Theologiae · II-II, q. 29, a. 4

Whether Peace Is a Virtue?

Thomas Aquinas, Summa Theologiae, Second Part of the Second Part, question 29, Of Peace, article 4. About 2 min.

Read in the reading room → This article at New Advent

Text: Summa Theologiae, Project Gutenberg #18755, Second Part of the Second Part (Secunda Secundae), translated by the Fathers of the English Dominican Province. The Second Part of the Second Part of the Summa in the English Dominican translation (first printed 1911 to 1925; second and revised edition from 1920). A sample check on 2026-11-09 against pre-1931 printings at the Internet Archive (first printings of 1915 and 1916 and the second and revised edition of the 1920s) found that the article text matches, with no 1947 introduction, synopsis, or index. Question and article numbers were added by the transcriber. Rights: Public domain (US)

This eBook is for the use of anyone anywhere in the United States and most other parts of the world at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org. If you are not located in the United States, you will have to check the laws of the country where you are located before using this eBook.

Objection 1: It would seem that peace is a virtue. For nothing is a matter of precept, unless it be an act of virtue. But there are precepts about keeping peace, for example: "Have peace among you" (Mk. 9:49). Therefore peace is a virtue.

Obj. 2: Further, we do not merit except by acts of virtue. Now it is meritorious to keep peace, according to Matt. 5:9: "Blessed are the peacemakers, for they shall be called the children of God." Therefore peace is a virtue.

Obj. 3: Further, vices are opposed to virtues. But dissensions, which are contrary to peace, are numbered among the vices (Gal. 5:20). Therefore peace is a virtue.

On the contrary, Virtue is not the last end, but the way thereto. But peace is the last end, in a sense, as Augustine says (De Civ. Dei xix, 11). Therefore peace is not a virtue.

I answer that, As stated above (Q. 28, A. 4), when a number of acts all proceeding uniformly from an agent, follow one from the other, they all arise from the same virtue, nor do they each have a virtue from which they proceed, as may be seen in corporeal things. For, though fire by heating, both liquefies and rarefies, there are not two powers in fire, one of liquefaction, the other of rarefaction: and fire produces all such actions by its own power of calefaction.

Since then charity causes peace precisely because it is love of God and of our neighbor, as shown above (A. 3), there is no other virtue except charity whose proper act is peace, as we have also said in reference to joy (Q. 28, A. 4).

Reply Obj. 1: We are commanded to keep peace because it is an act of charity; and for this reason too it is a meritorious act. Hence it is placed among the beatitudes, which are acts of perfect virtue, as stated above (I-II, Q. 69, AA. 1, 3). It is also numbered among the fruits, in so far as it is a final good, having spiritual sweetness.

This suffices for the Reply to the Second Objection.

Reply Obj. 3: Several vices are opposed to one virtue in respect of its various acts: so that not only is hatred opposed to charity, in respect of its act which is love, but also sloth and envy, in respect of joy, and dissension in respect of peace.

Also online, linked only: the same translation at New Advent and the Latin text at Corpus Thomisticum. Neither is copied here.

Source: Thomas Aquinas. Summa Theologica, Second Part of the Second Part. Project Gutenberg #18755. Project Gutenberg record. Public domain in the USA. Outside the U.S., check local copyright rules. Project Gutenberg notices retained. The full Project Gutenberg license is kept in the hosted text.