No, the basis of communism is basically that resources are finite, and that the guy who has more has more at the expense of someone else, who because one person has more, has less.
The example he uses is the communists who confiscated the land of successful farmers, what happened is, the people who took over cant farm, and long story short, everyone starved to death.
So if you say we need less population its the same argument but executed differently, which results in the same eventual conclusion.
Maybe i dont explain it properly, regardless, jordan is very emotional and will say things like that.
They are not actually in favor of eugenics, i am, my reason for it is simply to improve people, dont care about climate effects.
It was from this book https://en.wikipedia.org/wiki/The_Gulag_Archipelago
If you read it and understood the dangers of Communism you might not be so quick to give the government the sort of power to enact a Eugenics program. You might also understand why Peterson gets emotional about this ****.