Which major philosophical concept, famously explored in Plato’s *Republic* through the Allegory of the Cave, posits that ultimate reality consists of non-physical, eternal, and perfect ideas, accessible only through intellect?

💡 Explanation:

The Theory of Forms (or Theory of Ideas) is Plato's doctrine that the physical world is not as real or true as the realm of Forms. The Forms are non-spatial, non-temporal objects of understanding, such as Justice, Beauty, and the Good, which serve as perfect blueprints for everything we perceive.