everything is left. 3 choices out of an infinite number leaves a lot of options.
Capitalism has never existed tho, far from working for 1000s of years.
anarcho syndicalism is one of many alternative systems. But seriously there must be 300 different hybrids that have already been tested in the real world. Non of them were capitalism, many involved degrees of authoritarianism, fascism, socialism, democracy, social democracy, autocracy, monarchy, oligarchy and most of them worked. Rome for example did quite well and the Roman economy blended a variety of ideas and classes.
ok, you're talking politics, not the free market.
Capitalism is what we use, we use it b/c many of the other ideas you listed can't be corrected w/o a coup.
It's been capitalism, just under different names. A rose by any other name...
It used to be trading. I'll give you a pound of apples for a 1/2 pound of meat. Now, I'll give you the dollar equivalent of a pound of apples for 1/2 pound of meat.
This allowed non-producers to flourish. You no longer had to have a skill set that could be traded for food. So now we have artist, engineers, scientist, etc etc. All b/c capitalism allows them to do such things for a living.