The Summa Theologica is one of the most influential and comprehensive works of medieval philosophy and theology. Written by St. Thomas Aquinas, a brilliant theologian and scholastic philosopher, it covers a wide range of topics, from the existence and nature of God to the moral and political implications of human actions. In this voluminous text, Aquinas develops his famous arguments for the existence of God, the immortality of the soul, and the natural law theory, among other doctrines. He also engages with the works of his predecessors and contemporaries, such as Aristotle, Augustine, and Avicenna. Today, the Summa Theologica remains a key reference for scholars and students of philosophy, theology, and intellectual history. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.