Our system is capitalism. It is a human social organizational system. It is what you do with people. It is not what you do with numbers or math.
When you have a lot of people you need to do something with them. Western man, in the Europe that formed itself from the medieval age on, found that trade was more effective than warfare. War is simply too violent. Trade works better.
With the increasing reliance upon trade instead of solely upon violence or war, what developed is the kind of human system called "capitalism."
We ought to regard capitalism, therefore, as a resource. It comes about through causes, not because of some "facts" that "exist" in the abstract world of mathamatics.