For 10 points, name this author of Summa Contra Gentiles, a scholastic philosopher who also wrote Summa Theologica.
This philosopher refuted the errors of the Greek Orthodox Church in a treatise written to Pope Urban IV. This philosopher argued that the demonstrated truths of science do not contradict the revealed truths of the Christian faith in an apologetic work targeted at non-Christians, and in his most famous work, he included rightful intent, sovereign authority, and the motive of peace as features of a "just war." That work of his includes first cause and contingency among his quinque viae, five arguments in support of the existence of God. For 10 points, name this author of Summa Contra Gentiles, a scholastic philosopher who also wrote Summa Theologica.
This philosopher refuted the errors of the Greek Orthodox Church in a treatise written to Pope Urban IV.
Saint Thomas Aquinas [accept Thomas of Aquino]