Yeah. And while I'm not saying the OP is doing this, "overpulation" is often used as white supremacist dog whistle and call for eugenics.
The population extremists from the 60s, many in the 'green revolution' were part of that, were VERY actively promoting eugenics and wanted to deploy it on a massive global scale.
And this was not new, Eugenics was massive popular with the Progressives, in fact the Progressives were the primary political power behind Eugenics. And those are the exact groups moved over turned into the 'environmentalist' movement that was advocating those same Eugenics policy recommendation, but on a global scale. And because they were smart, they changed the language from 'We need to clean the human race' to 'If we don't clean the human race everybody is gone die'.
They wanted the US government to make aid conditional on Eugenics and population control tactics. Trying to prevent the population growth in India was one of their major goals and reading now what they advocated should be done about it, is truly disturbing.
Many of those, to be fair were not white supremacists, but if your main position is to advocate extreme policy to curb baby production in Asian and African countries, how much better are your really?
Whenever somebody quotes population control quotes from people associated with that movement these facts should be pointed out. Specially if it is in the 'referent' ton that indicates a willingness to support the same kinds of polices.
To be clear I'm not taking about everything that one means when saying the word 'Progressive' now. As that term is pretty watered down by now.
In general when talking about broad political and social moments its hard to come up with who 'exactly' they are.
Who prominently?
There definitely was a pro-eugenics movement in much of the West before WW2, but the anti-GMO fight is a very different one occuring 50 years later! I'd be surprised if there were very many people involved in both.
Think about the amount of concrete alone that would need to be used to get Africa up to 1st world standards. China used more in a few years than America did in a century. This will have to happen many times over just for the current population level, never mind a growing one!
It is like living in a house and everyone agreeing to cut their energy use by 20%.... while bringing in a new resident every few months.