65438+ Why did the center of science, technology and economy shift from Britain to the United States at the end of the 20th century?

The situation in the United States. The war of independence overthrew British colonial rule and opened the way for the development of capitalism. The promotion of the industrial revolution; Open up the territory and develop the west; Excellent conditions: abundant resources and broad market; The adverse international environment is superior and less affected by the war; A large number of immigrants, providing labor and technology.

The situation in Britain belongs to "colonial imperialism", which means that it has the largest colony in the world and can get very rich returns without a high level of science and technology. For example, if you have two slaves, all they need is some bad food as food. With cattle, you have to take care of it every day, buy all the tools for plowing, and find someone to wash his body every day. Which one would you choose? Although using cattle will save manpower, British domestic capital chose not to improve technology to increase income. In this case, there will be no difference in two years, but if it is 20 years or 50 years, the gap will be very, very large.