Unity in wills cannot be unless there is one will dominating and ruling all the rest to oneness... wills of mortals have need of a directive principle... therefore for the well-being of the world, there should be a monarchy.
The greatest gift that God in His bounty made in creation, and the most conformable to His goodness, and that which He prizes the most, was the freedom of will, with which the creatures with intelligence, they all and they alone, were and are endowed.
Through me the way into the suffering city, Through me the way to the eternal pain, Through me the way that runs among the lost. Justice urged on my high artificer; My maker was divine authority, The highest wisdom, and the primal love. Before me nothing but eternal things were made, And I endure eternally. Abandon every hope, ye who enter here.
Open your mind to what I shall disclose, and hold it fast within you; he who hears, but does not hold what he has heard, learns nothing. Beatrice - Canto V 40-42