St. Thomas Aquinas: Natural Law Theory; Just War Theory Natural Law is a set of morals, based on what are assumed to be the everlasting characteristics of human nature, that serves as a standard for evaluating conduct and civil laws. It is considered essentially enduring and astronomically relevant, because of the double meaning of the word nature, the meaning of natural varies. Thus, natural law may be considered an ideal to which humanity aspires or a general fact, the way human beings usually act. Natural law is contrasted with positive law, the enactment's of civil society. Christians found the natural law ideolog