Originally Posted by
Philippon
In regards to conversion, I have to agree with several opinions so far expressed. While there have been exceptions such as Ireland in the 5th century and Islam in the 7th and Africa in the 20th, the typical conversion to a new relgion does not happen overnight, unless you count the fashionable Christian heresies which could quickly muster up to one third of the whole body of Chrisitanity in as little as ten years as was with Arianism in the 4th century and Protestantism in the 16th, or suck up to half the body in a single area within a couple of years as was the case with the Hussites in Bohemia in the 15th.
But other wise, conversion was a slow process normally. Germany took a few centuries with the last tribes converting 500 years after the first missionaries walked into those forests. In the case of Islam in Spain the Moslem were never able to secure more than a small minority of the local population to Islam. Catholicism proved quite stubborn.
And here's the interesting thing about Christian heresies. They were far more likely to appear in prosperous provences than poor provences and driven by the fashions of the time, very quickly would appear outmoded, outdated, and backward, slowly succumbing to, of all things, Paganism or Islam. In the case of the initial Moslem conquest, the areas of Palastine, Syria, Egypt, Africa, and Spain were all hotbeds of the last 300 years of Christian heresy, Donitism, Monthelitism, and Arianism. All three heresies vanished literally in a single generation, all converting to Islam. Only the minority Orthodox in Palastine and Syria, the Copitics in Egypt, the Catholics in Spain, and the Chaldeans in Mesopotamia were left after 7th century, but they held out for a very long time indeed. Even today, there are small bodies of them left in those areas.