“The 'realist' conception of continuing old-fashioned 'balance of power' politics may have been well founded in the past, but it is inconsistent with our increasing interdependent world. On moral grounds alone there can be no justification for the 20th century level of killing. To settle disputes without violence must become the primary goal of foreign policy for every nation.”
Robert McNamara
Thomas Aquinas is credited as one of the greatest proponents of natural law. During his time in Cologne he was taught by Albertus Magnus. Magnus used the teachings of Aristotle in his mentorship of Thomas Aquinas.