Other species don’t need clean water, clothes, complex tools and growing food. This makes their life simpler yet limits their number and habitat.
Try to live in a village growing own food. It’s a hard work, especially if you have cattles or other domestic animals. Villagers work from early morning to evening because there’s a lot things to do. Living in a city is much easier.
Ah, communism is like unicorns. Many people like them but nobody have seen them alive. Because every communist state is not communist but authoritarian.