Medieval theorists of nobility relied on earlier classical concepts (Platonic, Aristotelian and Christian-Hellenistic) of what personal traits and virtues constitute grounds for ennoblement. In
Plato's Republic, he provides for promotion and degradation of citizens according to a strict spiritual meritocracy. In the words of
Will Durant, "If the ruler's son is a dolt he falls at the first shearing; if the boot-black's son is a man of ability the way is clear for him to become a guardian of the state" (Durant,
The Story of Philosophy, 1961, p. 28). In medieval times,
heraldic writers cited biblical examples to demonstrate that nobility is not just a matter of descent but of personal
virtue: Shem, Ham and Japheth sprang from the same father, yet Ham was ignoble and
King David rose from shepherd to become king through sheer faith and soldierly
courage.
Bartolus defined natural nobility by reference to
Aristotle, who in his
Politics explains how some are marked out for freedom by their virtues (and specifically by their capacity to rule), and are so distinguished from the mass of men whose talents fit them only for a servile role. Those free men whose virtues thus fit them to rule Bartolus defines as the natural nobility. With regard to natural nobility, Bartolus applauded
Dante Alighieri's argument in his
Convivio that nobility does not derive from ancient riches adorned with fine manners, but is the meed of individual virtue. Bartolus argues that the prince should strive to make his dominion a true mirror of God's own by advancing only those who are naturally noble (see
Maurice Keen,
Chivalry, p. 149).
Geoffroi de Charny, the noted celebrant of
knighthood, argued "God will mark out those who labor valorously, even though they come of little estate" (
Livre de chevalrie, in Oeuvres de Froissart, ed. K. de Lettenhove I, pt. iii, 494, 495). During the Renaissance, the Platonic-Christian humanist belief in virtue as the essence of nobility was summed up in the Latin phrase:
Virtus vera nobilitas est (Virtue is the True Nobility). The
counter-revolutionary author
Edmund Burke wrote on merit-based promotion: "...the road to eminence and power, from obscure condition, ought not to be made too easy, nor a thing too much of course. If rare merit be the rarest of all rare things, it ought to pass through some sort of probation. The temple of honor ought to be seated on an eminence. If it be opened through virtue, let it be remembered, too, that virtue is never tried but by some difficulty and some struggle."
Napoleon Bonaparte and
Friedrich Nietzsche were later to continue the tradition of promoting a vision of aristocratic
meritocracy, although no longer within (and opposed to) the Catholic-chivalric framework. == Kingdom of Poland ==