When I was young and in Catholic Grammar School, the only similarity to this question told to US by the nuns and lay teachers was that when Jordan gave back the Holy Land, the world would end. I have asked this question repeatedly from all sources on the net, with no definitive answer. That's the best I can say. Merry Christmas/Happy Holidays.
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The Feudal system was broken down more, and a monarchy emerged. The poor had a better chance of gaining wealth, and people started to trade with the Middle East.