Get some humans off earth onto Mars, and the post-humans will come back and look at earth like the "earthicans" (futurama term, lol) are a bunch of braindead monkeys.
Remove economics a bit and raise up survival needs and the change will happen far more rapidly then trying to subvert millennium old dogmas. My opinion, at least.
That's pretty much why GMO's are even 'allowed' to exist - remove them and there simply isn't enough food production to feed everyone. Europe would lift that ban tomorrow if the US decided to ban production and millions of people around the world started dying of starvation - call it altruistic to hide the fact that the economic vacuum left behind would make billions for those that fill it...
Anyway, eugenics will need that to really take off, but strong AI not so much. Machine Leaning AI's are economically some of the most well funded research projects today, which are precursors to strong AI. Its still a big step up from there, but we're getting there.
Btw, a dozen decades (12 * 10 years = 120 years), +/- a century (120+100, or 120-100) would be between 20 and 220 years. People get all mystic/doomsday/optimistic with their predictions regarding these things, and that range captures most every prediction.
I think MSJ meant 'organically' as in it will naturally happen over time and trying to push it 'before people are ready' will have the opposite effect. I'm with you though, little we do as humans is 'natural', and thinking that eugenics crosses some kind of line that hasn't already been crossed to me is a sort of a fundamental misunderstanding of reality.
"Natural" makes me chuckle. Either nothing has been "natural" since we started farming and metal working, or everything that humans do is "natural" because we aren't magical beings that exist outside of nature.
"Playing God" is equally nebulous as far as I'm concerned, and then we're back to rehashing "whose god, who gets to decide, why them, shouldn't there be some kind of vote, why is voting better than..." etc. etc.
Even ignoring that, Humanity started playing god when we started cultivating farmland, domesticating animals, and genetically modifying our enslaved animals/plants via animal husbandry and cultivation. Eugenics has been around for nearly as far back as human history goes, applying it directly at the genetic level is more of the same if you ask me.
"GMO" is a meaningless term used by some groups to stay in control. Nearly everything in an industrialized country is genetically modified. From the grass we walk on to the food we eat.