Philosophy
The Problem of Universals in Medieval Philosophy and Nominalism
Quick fact
The debate over universals was so intense that it led to the nominalist William of Ockham being accused of heresy, and his views were condemned by the Pope in 1324.
Why this is interesting
You've seen many red apples, red cars, and red roses—but have you ever seen 'redness' itself? Medieval philosophers argued for centuries about whether such shared qualities are real things or just names we invent.
Read the full explanation
Understanding The Problem of Universals in Medieval Philosophy and Nominalism
Imagine you have three cups of coffee, each slightly different. You can say 'they are all coffee'—but what makes them all coffee? The problem of universals asks: does the shared quality 'coffee-ness' exist in the world, or is it just a label we apply? In medieval times, this question was central to understanding God, creation, and human knowledge. The three main answers were: realism (universals are real, existing independently), nominalism (universals are just names, not real things), and conceptualism (universals exist only as concepts in the mind). For example, a realist would say 'humanity' exists as a distinct entity, while a nominalist would say there are only individual humans, and 'humanity' is just a word we use to group them.
A deeper explanation
The problem of universals arises because we perceive things in two ways: particular objects (like this specific apple) and general properties (like redness). Medieval philosophers inherited this from Plato and Aristotle. Plato believed in perfect Forms, transcendent universals, while Aristotle saw universals as immanent in things. In the medieval period, thinkers like Thomas Aquinas held a moderate realism, saying universals exist in the mind but correspond to shared natures in things. Nominalists like William of Ockham argued that only particulars exist, and universals are merely linguistic conveniences. Ockham famously used his razor to eliminate unnecessary entities, claiming that positing real universals multiplies beings without explanatory benefit. This has profound implications: if universals are not real, then our classifications and language are human constructs, not reflections of an objective structure. This shift paved the way for nominalist approaches in science and modern philosophy, influencing empiricism and the idea that meaning lies in individual experiences rather than abstract essences.