Judy,
Very well written essay on a tough topic, difficult to read, but must be read. Thanks for a many faceted view on eugenics.
I fully subscribe to a future full of "all babies born strong and healthy."
I wish you had elaborated much more on "engineer greater intellect" and "attitudes" and especially "intellectual development seems to be immune from genetic engineering". If I may use a word I am more familiar with it is the word "think". I believe that people can be taught to think, but it all breaks down when "attitudes" and responsibility raise their heads - two factors that make consensus on what to do problematic.
Your point about "improved methods of thinking" requiring broader and broader fields is spot on. Your essay made me think.
I will appreciate your comments on my essay (here). I celebrate difference as a definer of humanity's future, which I'm glad your essay says will always exist.