(Philosophy) Any theory which conceives will to be the dominant factor in experience or in the constitution of the world; contrasted with intellectualism. Schopenhauer and Fichte are typical exponents of the two types of metaphysical voluntarism, Schopenhauer teaching that the evolution of the universe is the activity of a blind and irrational will, Fichte holding that the intelligent activity of the ego is the fundamental fact of reality.
