The intelligence levels are roughly analogous to 1930's America. The issue isn't intelligence...Except that we know that intelligence benefits -can- still be achieved, because we are still seeing improvements. The Flynn effect is still being observed in lower-than-average IQ populations in the SU

Only if you believe in the Flynn effect and you are willing to extrapolate backwards and infer that Western populations were border-line retarded then and were of comparable levels to other populations now.

No, I'm assuming everything you say is true, and telling you your conclusions are still wrong.

This does not address the point I made about proximate versus indirect effects of interventions.