Coercion, exercised by their lords upon a docile people trained to implicit obedience, would explain something of the initial success of the missions; but it would leave many other matters unexplained: the later success of the secret propaganda, the fervour and courage of the converts under persecution, the long-continued indifference of the chiefs of the ancestor-cult to the progress of the hostile faith.... When Christianity first began to spread through the Roman empire, the ancestral religion had fallen into decay, the structure of society had lost its original form, and there was no religious conservatism really capable of successful resistance. But in the Japan of the sixteenth and seventeenth centuries, the religion of the ancestors was very much alive; and society was only entering upon the second period of its yet imperfect integration. The Jesuit conversions were not made among a people already losing their ancient faith, but in one of the most intensely religious and conservative societies that ever existed. Christianity of any sort could not [337] have been introduced into such a society without effecting structural disintegrations,--disintegrations, at least, of a local character. How far these disintegrations extended and penetrated we do not know; and we have yet no adequate explanation of the long inertia of the native religious instinct in the face of danger. But there are certain historical facts which appear to throw at least a side-light upon the subject. The early Jesuit policy in China, as established by Ricci, had been to leave converts free to practise the ancestral rites. So long as this policy was followed, the missions prospered. When, in consequence of this compromise, dissensions arose, the matter was referred to Rome. Pope Innocent X decided for intolerance by a bull issued in 1645; and the Jesuit missions were thereby practically ruined in China. Pope Innocent's decision was indeed reversed the very next year by a bull of Pope Alexander VIII; but again and again contests were raised by the religious bodies over this question of ancestor-worship, until in 1693 Pope Clement XI definitively prohibited converts from practising the ancestral rites under any form whatsoever.... All the efforts of all the missions in the Far East have ever since then failed to advance the cause of Christianity. The sociological reason is plain.