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.
“Thus war became sweeter in their eyes even than returning home in their ships. As when some great forest fire is raging upon a mountain top and its light is seen afar, even so as they marched the gleam of their armor flashed up into the firmament of heaven.”
The Iliad by Homer