Somebody created this theory that autistics are part Neanderthal and this theory makes a lot of sense. What's especially impressive is that this theory was conceived before scientists concluded that non-Africans have Neanderthal DNA so the theory had predictive validity.
I believe that Neanderthals had bigger brains and were smarter than humans however humans had the capacity to communicate and thus COMBINE their intelligence. So while Neanderthal could outsmart humans one on one, humans had more COLLECTIVE intelligence and thus could outsmart Neanderthals group against group.
As a result of their inferior social and linguistic communication skills, Neanderthals were slaughtered by humans but a few Neanderthal genes survived in the human population. Now humans had both their original communication skills, but also the Neanderthal genes enhanced their brain size. So with both human communication skill and overall High IQ inherited from Neanderthals, modern humans were unstoppable and the great leap forward occurred giving rise to art and symbolic thought.
Now a few humans had extra Neanderthal DNA and they were smart enough to be engineers and math/tech types. However in the kids of math/tech types, you sometimes get too much Neanderthal genes and you'd get a brain that wanted to grow as big as a neanderthal's but it couldn't fit into the smaller human skull, so after accelerated brain growth in childhood expanding the skull, the brain begins to shrink. All this does damage to the brain, a condition we call autism today.
I suggest one way to diagnose autism in adults is to check if the brain is too small for the skull.
Last edited by wogaboo on 28 Jan 2012, 11:34 am, edited 1 time in total.