Have you heard of Russians capturing slaves in Africa or attempting to increase their population through immigration? I haven't. In socialist times, there was no deliberate plan to grow population for the sake of profit, because there were no capitalist structures to profit from that.
Michael, I hope you are right and I am wrong. But of course I wrote the above because I believe in it.
Humans main problem starts with "private property". The Queen wrongfully created the notion that all land belongs to humans and is "crown property". This allows for the crown property to be sold and made private property. Private property gets developed and the ecosystem with the thousands of animal and plant species which were also rightful owners of the land, is wiped out.
Because animals cannot have land they will be wiped out. Currently their last remaining sanctuaries get developed for timber harvesting , mineral and oil and gas exploitation.
I am not too sure why you think the population increase is slowing down. We get our 300,000 immigrants in Canada every year. This is one huge city being built in the wilderness every year with the corresponding green house emissions. Chinese have scrapped their 1 child per family policy and are now over 1.5 billion. I doubt that India or the African countries are doing any differently.
We are indeed headed towards cannibalism and our own extinction.