I was going to mention that as a limitation but it was already getting quite long.
I don’t think that kind of constraint would impose a very hard limit in the minimum size, judging from evidence like: most people with dwarfism have normal cogitative abilities, animals like crows have intelligences disproportionate to their brain size.
It’s still something to consider though and exactly how considerable a factor it would be could be an area for possible research. Could you make people pixie sized? for example.
Yeah it didn’t really occur to me that that was what I was advocating till a while after I had the idea.
But I do mention that it’s meant more as a proposal for a future scenario where eugenics(might be too strong/loaded a term) is considered acceptable or becomes inevitable because of competition between individuals. In that scenario it would be better to push heights down than up.
Still I think we should keep an open mind.
There might also be ways of reducing average height other than gene editing, which wouldn’t technically be eugenics I guess.