I suppose banks have nothing to do with capitalism? Do banks appear by themselves?

Bartering is the natural economy that "appears by itself." Once you abstract money, you are following a plan; a plan that includes banks, foreign exchange, futures and commodity pricing.

Capitalism requires banking and some form of money, minimum. That's already inorganic. Those two are enough to begin a cycle of debt based fractional lending, industrial revolution and world war. It may be a mechanism but it is a mechanism employed by people with a very definite plan.