Archaeologists divide the prehistory of the Maya region into the Preclassic (c.1500 B.C.–A.D. 300), Classic (300–900), and Postclassic (900–1500) periods, and concur that in most parts of this large region the most spectacular florescence occurred during the Classic period. This was followed, in much of the area with the exception of Yucatán, by a demographic collapse at the end of which (c.A.D. 1100) close to 90% of the population had been lost.
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