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While I'm positive that being educated will not cause your kids to be born with Autism, I would not be surprised to learn that the cause is a gene that is more prevalent in white people and becomes more likely to activate as you get older...much like Down's Syndrome (at least I know age is a factor there, race may not be, I don't remember).
http://www.npr.org/templates/story/story.php?storyId=122256276&ps=cprs
http://www.npr.org/templates/story/story.php?storyId=122256276&ps=cprs