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?