I have been under the impression that it just a natural occurrence for humans, and that in our society that it seems negative, in actuality ADD/ADHD people are just specialized at living life a little bit differently, leaning on the theory that all are born for specialization and purpose built into them, (by scientific necessity or God).

Edit: I guess to say further that since our society was looking to demonize everything that would actually help us as a society, our schools prevent these children/adults from succeeding.