"By the way Iv no particular axe to grind on this question,as I think it would probably be quite a good thing ,inthe long term, if the Western economies collapsed and we reverted to the Stone age."

I think you would be pretty lonely in wishing that...Ake, you gotta be barkin' mad.

While adopting a democractic system of government would not end Islam, it would break the power of the few. That is exactly what happenned to the Church of Rome (i.e. Rennaissence - Reformation)