What facts hindered the development of the United States, and what helped in the 19th century?

The United States is considered a newly formed state that has been able to achieve a high level of development. For a long time the state was dependent on the metropolis, namely, England. It did not allow local factories and enterprises to develop organically. After the War of Independence, the United States was given the opportunity to develop indefinitely. This helped to develop a powerful system later on. New paths were opened at the beginning of the 19th century, when the influence of the countries of the old world on the economy declined. The USA has developed foreign markets.