conceptions which made the instinctive Platonism of the mediaeval Church even more soaring than that of Plato. While the Republic of Plato had halted at the stage of a civic society, the _respublica Christiana_ of the Middle Ages rose to the height of a single _humana civilitas_. While Plato had divided the men of his Republic into classes of gold and silver and bronze, and had reserved the ecstasy of the aspect of the divine Idea for a single class, the mediaeval Church opened the mystery of the Mass and the glory of the fruition of God to all believers, and, if she believed in three estates, nevertheless gathered the three in one around the common altar of the Redeemer. Serfdom might still remain, and find tolerance, in the economic working of society; but in the Church herself, assembled together for the intimate purposes of her own life, there was 'neither bond nor free'. The prevalence of Realism, which marks mediaeval metaphysics down to the end of the thirteenth century, is another Platonic inheritance, and another impulse to unity. The Universal _is_, and is a veritable thing, in which the Particular shares, and acquires its substance by its degree of sharing. The One transcends the Many; the unity of mankind is greater than the differences between men; and the university of mortal men, as Ockham writes, is one community. If there be thus one community, and one only, some negative results follow, which have their importance. In the first place, we can hardly say that the Middle Ages have any conception of the State. The notion of the State involves plurality; but plurality is _ex hypothesi_ not to be found. The notion of the State further involves sovereignty, in the sense of final and complete control of its members by each of a number of societies. But this, again, is _ex hypothesi_ not to be found. There is one final control, and one only, in the mediaeval system--the control of Christian principle, exerted in the last resort, and exerted everywhere, without respect of persons, by the ruling vicar of Christ. But if plurality and sovereignty thus disappear from our political philosophy, we need a new orientation of all our theory. We must forget to speak of nations. We must forget, as probably many of us would be very glad to forget, the claims of national cultures, each pretending to be a complete satisfaction and fulfilment of the national mind; and we must remember, with Dante, that culture (which he called 'civility') is the common possession of Christian humanity. We must even forget, to some extent, the existence of different national laws. It is true that mediaeval theory admitted the fact of customary law, which varied from place to place. But this customary law was hardly national: it varied not only from country to country, but also from fief to fief, and even from manor to manor. It was too multiform to be national, and too infinitely various to square with political boundaries. Nor was customary law, in mediaeval theory,