When I was growing up as a precocious child in the rural corn belt of Nebraska, I was frequently asked “Why can’t you be normal”.  My classmates, the adults in my life, and even my own family asked me this frequently. I didn’t have the foresight or the courage then to ask “What defines normal” or even “Who defines normal”.

Looking back on it years later I know I never would have gotten any kind of direct answer simply because what qualifies as normal keeps changing.  In 1750 it was normal for two out of three children born in London, England to die before their fifth birthday.  Now in the developed world (and increasingly so in the developing nations) infant mortality is rare.  It is so rare now that if most of us were to look back five or six generations in our family tree, we would find that our…