The american system can best be described as a plan.
economic
military
political
social

I believe the answer is an economic plan. The "american system" is usually associated with the ideals of a free market capitalist system.

The American System can BEST be described as a economic plan.

Explanation:

    The United States is the most important economy on the planet. It is a liberal capitalist regime in which we can find every type of company, from large economic groups present in different countries, to small family businesses. The business sector is very well structured. Participates in the NAFTA economic bloc.

    It is a country with diverse natural resources, with large reserves of coal and iron. This country is the largest industrial power on the planet, has cheap energy and, even so, to produce so much, it has very high costs. This is the biggest problem in the American industry: it has a highly competitive and very polluting industry. Investment in the industry is very high. The labor force is cheap and very specialized, all these facts make your industry very competitive worldwide.

    The United States has one of the most dense and efficient communication systems in the world, the road and rail networks allow the integration of the entire territory, especially the large agglomerations and large economic centers of the country.