https://en.m.wikipedia.org/wiki/Morgenthau_Plan
After World War 2, the Morgenthau Plan was to de-industrialize Germany and make it a farming economy.
Once it was estimated that would eliminate 1/2 the population, the planners got cold feet.
Apparently modern liberals aren’t so queasy. Of course they would be allowed to live.
The OSS/CIA cut Secretary Morgenthau’s plan off at the knees. It went nowhere fast.