Thomas Aquinas was an Italian Dominican friar, Roman Catholic priest and Doctor of the Church. He was an immensely influential philosopher, theologian, and jurist in the tradition of scholasticism.
He was the foremost classical proponent of natural theology and the father of Thomism, in which he argued that reason is found in God. His influence on Western thought is considerable, and much of modern philosophy developed or opposed his ideas, particularly in the areas of ethics, natural law, metaphysics, and political theory. His work, ‘Summa Theologiae’ (1256-59) is a landmark in apologetics.