To be fair, if we look close, we see ecosystems within ecosystems, including a buttload of predation and two buttloads of parasitism. Parasites capitalizing on other lifeforms to utilize their energy and resources for their own growth and reproduction, as far as the eye can see.

And that's what human society is. It's much less prone to top-down parasitism in tiny societies (less than 500 members) but when we have communities of millions and states of tens of millions, it's pretty easy for religious ministries and ideological politicians to take over the system to make giant militaries that hammer other, less-captured societies.

Every once in a while some of us get the idea, what if we make a system that doesn't involve parasitism. I bet we can make everyone pretty happy. And this is true, except that the parasites really like having ridiculous amounts of wealth and power, and would rather render the entire species extinct than be confined to being a (well-to-do, comfortable) commoner.

This is why, even though there have been successful anarcho-communist organizations, they are often attacked by state law enforcement acting not in enforcing law, but in preserving political power.

No war but class war.

Death to monarchists.