After considering by what agencies the seeds of religious belief were carried from place to place, we have to examine, what was even more important, the quality of the soil on which they fell. And here, to continue the metaphor, we shall find that the Roman plough had not only broken through the crust of particularist prejudice, but had turned up new social strata eminently fitted to receive and nourish the germs scattered over their surface by every breeze and every bird of passage, or planted and watered by a spiritual sower’s hand. Along with the positive check of an established worship, the negative check of dissolving criticism had, to a great extent, disappeared with the destruction of the régime which had been most favourable to its exercise during the early stages of progress. The old city aristocracies were not merely opposed on patriotic grounds to free-trade in religion, but, as the most educated and independent class in the community, they were the first to shake off supernatural beliefs of every kind. We have grown so accustomed to seeing those beliefs upheld by the partisans of political privilege and attacked in the name of democratic principles, that we are apt to forget how very modern is the association of free-thought with the supremacy of numbers. It only dates from the French Revolution, and even now it is far from obtaining everywhere. Athens was the most perfectly organised democracy of antiquity, and in the course of this work we have repeatedly had occasion to observe how strong was the spirit of religious bigotry among the Athenian people. If we want rationalistic opinions we must go to the great nobles and their friends, to a Pericles, a Critias, or a Protagoras. There must also have been perfect intellectual liberty among the Roman nobles who took up Hellenic culture with such eagerness towards the middle of the second century B.C., and among those who, at a later period, listened with equanimity or approval to Caesar’s profession of Epicureanism in a crowded senatorial debate. It was as much in order that the _De Rerum Naturâ_ should have been written by a member of this class as that the _Aeneid_ should proceed from the pen of a modest provincial farmer. In positive knowledge, Virgil greatly excelled Lucretius, but his beliefs were inevitably determined by the traditions of his ignorant neighbours. When civil war, proscription, delation, and, perhaps more than any other cause, their own delirious extravagance, had wrought the ruin of the Roman aristocracy, their places were taken by respectable provincials who brought with them the convictions without the genius of the Mantuan poet; and thenceforward the tide of religious reaction never ceased rising until the Crusades, which were its supreme expression, unexpectedly brought about a first revival of Hellenic culture. On that occasion, also, the first symptoms of revolt manifested themselves among the nobles; taking the form of Gnosticism in the brilliant courts