The History books are wrong and not just on this subject but on many others.
What happens when scientific evidence conflicts with theory? In the early sixties, discoveries were made in Central Mexico, which were the handiwork of early man. Exquisitely carved animal bones and advanced spear points caused much excitement, including a Life Magazine article, until the dates came in. 5 mutually exclusive geological tests revealed they were over 250,000 years old. In spite of the geochronology, archaeologists insisted the dates were too ridiculously old. This world-class archaeological region became off-limits for official research, a "professional forbidden zone."
This is the story of the shocking events that occurred, told first-hand by many of the actual participants. It reveals how one field of science can conflict with another and how new discoveries must battle evidence vs. belief, exposing what some have called "the dark side of archaeology."
"I am not going to believe those old dates," regardless to the evidence brings the discipline of archaeological science down to that of a religion. So, the old guardians like a priesthood want to maintain the official orthodoxy of their faith in the later dates no matter how counter to newly discovered evidence that belief may be.