Social hierarchy and natural order are similar concepts
The hierarchy of society was reproduced in the hierarchy of the universe itself; just as there was the pope, bishops and archbishops, the emperor. kings and nobles, so there was a celestial hierarchy of the nine choirs of angels, seraphim, cherubim thrones; dominations, virtues, and powers; principalities, archangels, and angels (all fruits of the imagination of the pseudo Dionysius). Each of these had a definite function to perform in the running of the universe, and they were attached in due rank to the planetary spheres to keep them in appropriate motion. The lowest order of mere angels that belonged to the sphere of the moon had naturally most to do with the order of human beings just below them. In general there was a cosmic order, a social order, an order inside the human body, all representing states to which Nature tended to return when it was disturbed. There was a place for everything and everything in its place. The elements were in order — earth underneath, water above it, air above that, and fire, the noblest element, at the top. The noble organs of the body — the heart and lungs — were carefully separated by the diaphragm from the inferior organs of the belly. The animals and the plants had their appropriate pans to play in this general order, not only in providing man with necessities, but even more by furnishing him with moral examples — the industriousness of the ant, the courage of the lion, the self-sacrifice of the pelican.