The answer would be in his book "Das Kapital." Marx's disagreement of the free enterprise system became evident in his book "Das Kapital" when he explained the theories and ideologies of the capitalist system. which he suggests, would lead to a nation's own demise.
Answer:
The unprecedented levels of production in domestic manufacturing and commercial agriculture during this period greatly strengthened the USA economy and reduced dependence on imports. Capitalism is greatly efficient and allowes Large economic growth!
D. It was built on loyalty