Volume 5 (Philosophy of Law and Jurisprudence) of Mortimer J. Adler and Peter Wolff’s The Great Ideas Program contains two readings from Thomas Aquinas’s “Treatise on Law” in Part I of the Second Part of his Summa Theologica. This reading is on Questions XC, Of the Essence of the Law, and XCIV, Of the Natural Law. The seventh reading is on Questions XCV, Of Human Law; XCVI, Of the Power of Human Law; and XCII, Of Change in Laws.
Here I’ll sketch Aquinas’s life, comment on the Summa Theologica, give the titles of the articles in the reading, and pose the questions asked by Adler and Wolff on the reading and summarize their answers to them. The sketch of Aquinas’s life and comment on Summa Theologica are from https://opentheism.wordpress.com/2018/06/22/6-aquinas-summa-theologica/.
Thomas Aquinas
Thomas was born in 1224/25 near Naples and entered the University of Naples in 1239. In 1244 he joined the Dominicans, who immediately assigned him to study theology in Paris. Opposed to his doing so, his family abducted him on his way to Paris. However finding that nothing could shake his determination, they released him the following year.
Arriving in Paris in 1245, Thomas began studying theology at the Dominican convent under Albertus Magnus, a champion of Aristotle. When Albertus was appointed to organize a Dominican house of studies at Cologne in 1248, he took Thomas with him. After four more years of study, Thomas received his bachelor’s degree in 1252 and returned to Paris to teach and to train to become a master in theology, which he became in 1256.
Although only a little more than thirty-one, Thomas was appointed to fill one of the two chairs allowed the Dominicans at the university. However, in 1259, after three years of theological teaching there, he returned to Italy, where he remained nine years, teaching and writing. Suddenly, in 1268, he was called back to Paris to combat both those who were opposed the use of Aristotle in theology and those who were presenting an Aristotelianism seemingly incompatible with Christianity.
In 1272 Thomas was recalled to Italy to reorganize all the theological courses of his order. He went to Naples, where he taught at the university and continued to write. However his writing career came suddenly to an end on December 6, 1273. While saying mass that morning a great change came over him, after which he stopped writing. Urged to complete Summa Theologica, which he had begun in 1267, he replied: “I can do no more; such things have been revealed to me that all I have written seems as straw, and I now await the end of my life” (quoted in Great Books of the Western World, volume 19, page vi).
The following year Thomas became ill on his way to attend the Council of Lyons, stopped at the Cistercian monastery of Fossanova, and died on March 7, 1274.
Summa Theologica
The Summa Theologica is a systematic exposition of theological knowledge, including knowledge about man and the world as related to God as well as knowledge about God, compiled from all available sources with the purpose of setting forth and defending Christian doctrine. Theological knowledge includes. Its sources include classical Greek (especially Aristotle) and medieval Jewish and Islamic philosophers as well as Christian thinkers.
It consists of three parts (with the Second Part, which our readings come from divided into two parts) divided into treatises. Each treatise is divided into questions, which are divided into articles. The title of each article gives the question in affirmative form. It is followed by a general negative answer, introduced by “We proceed thus to the [number of the article] Article,” and a listing of specific negative points called “Objections.” Then Aquinas summarizes the opposite view, introducing the summary with “On the contrary.” The body of the article, introduced by “I answer that,” gives Aquinas’ judgment on the various views. Finally Aquinas replies to the numbered objections in order. According to Adler and Cain, this form was typical of the day.
The same translation of The Summa Theologica that is in Great Books of the Western World is given at https://www.ccel.org/a/aquinas/summa/home.html.
The Articles in the Reading
Question XC – Of the Essence of the Law.
Article 1. Whether Law Is Something Pertaining to Reason?
Article 2. Whether the Law Is Always Directed to the Common Good?
Article 3. Whether the Reason of Any Man is Able to Make Laws?
Article 4. Whether Promulgation Is Essential to a Law?
Question XCIV – Of the Natural Law
Article 1. Whether the Natural Law Is a Habit?
Article 2. Whether the Natural Law Contains Several Precepts, or One Only?
Article 3. Whether All Acts of Virtue Are Prescribed by the Natural Law?
Article 4. Whether the Natural Law Is the Same in All Men?
Article 5. Whether the Natural Law Can be Changed?
Article 6. Whether the Law of Nature Can Be Abolished from the Heart of Man?
The first section in Adler and Wolff’s guide to the reading is on Question XC, and the second section in it is on Question XCIV.
Questions asked by Adler and Wolff in the third section of their guide to the reading
- Is there a natural law for man? In Question XCI Aquinas undertakes to prove that there is an eternal law and that the natural law is “the rational creature’s participation of the eternal law.”
- Is the natural law really law? Like law in general: (1) natural law is an ordinance of reason; (2) natural law is directed toward the common good; (3) natural law is made by a lawgiver is we consider God as one; and (4) the natural law is promulgated but the mode of promulgation is quite different from that of the positive law, being inscribed on the hearts of men rather than being promulgated verbally.
- In Justinian’s Institutes we read that law is “that which pleases the prince.” Is this a good definition of law? Aquinas makes law a thing of reason and thus maintains that what the sovereign wills must be reasonable if it is to be law. Also Aquinas argues than an unjust law is either no law or a law in name only whereas if law is that which pleases the prince waht would be an unjust law would still be a law if the emperor willed and enforced it. Adler and Wolff ask, “Does justice determine what is lawful, or does the law determine what is just?”