I don’t think you realise how much effort systems invest into their own existence. I don’t know how to begin to compare that.
Do you equate free market (what market?) with lawlessness?
That is, is robbery part of free market then? Or why not?
Im assuming you mean taxes also arent free market? In which case I wonder why other infrastructure should be. Why would any laws or police be part of the free market?
In the basic sense communism is to share labour profits by default, and there are plenty examples of that in nature. On the other hand I can’t really come up an example of free market - perhaps when they introduced money to monkeys and they immediately used it for sex (but I don’t recall there being much talk about pricing). They did the same when birds and they just communismed it (or remained as communist as before within a certain group I assume, taking moneys just as one of the resources).
What is in human nature is to adapt to circumstances - which includes various systems and infrastructure.
And people adapt quickly to good things as well as to bad things. Shockingly quickly in both cases.
The same with animals.
What is much harder is to go against the system & change it (like the actual system, not just the leaders or vips).