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			I don't know; I think some of them  (mambele sheild-walking throwers) ARE advanced designs.  By and large, I do not believe that continents fall to swords, but to economics, tricks, germs, and guns (when they are on one side, or tremendously more numerous/advanced on one side,  though IMHO far too much credit is given to guns, too, and as to Eurpean ships and sailing ability during the expansion?  I don't mean to be rude, but it is to laugh; compare the Indian Ocean; compare polynesia.......).
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