Private ownership of property.
Explanation:
The capitalism is an economic system which is primarily focusing private ownership of property. In this system, the government has no say in what the people buy, produce, consume, and in what amounts are those things done. The economy and free, and the producers and consumers are the ones that control it.
While this system is supposed to lead to the best possible situation where there is perfect competition so the products on the market are of the best possible quality and of the lowest possible prices, in practice there is one problem. The people that are the richest tend to constantly expand and move in into new economic sectors. Over time they manage to become too powerful, often controlling the politicians as well, and they manage to get so high power wise that at the end only few people are controlling the market, turning it into an oligopoly.
