Large-scale migration of talents

The United States itself is the foundation of immigration. Before 1900, the British parliamentary system (the optimized version of free economy) was absorbed. In fact, it was an agricultural country itself (the first hundred years) in order to get rid of the control of all European countries, defeat the European controllers and become a self-defense country.

Because for a century or two, several European powers have been at war with each other, and many people have taken their families to the stable United States! Among them, some capitalists, scientific and technological personnel and young people full of dreams entered the United States at different times and lived in a peaceful America, which was very beneficial to their careers.

So by around 1890, the peaceful and stable productivity of the United States has reached the first place in the world! At this time, it doesn't mean that the United States is technologically or militarily developed. It is mainly peaceful and peaceful, and everything is in an orderly way ... The brutal outbreak of World War I and World War II made Europe, the world scientific and cultural center, more chaotic, so the World Trade Center London moved to neutral new york. Until the 1920 s, only a few American troops were quite backward ... but American leaders fully realized that with strong industrial resources, the United States could not be immune, so it was considered as a preparatory force for sustainable development in this field! Especially intellectuals and heavy metal industry ... in fact, many people think that the United States is fully prepared for the war.

Actually, it's not. As soon as the United States enters the war, it doesn't mean how powerful it will be immediately! He mainly accumulated strength through the experience of the British armed forces ... such as naval warfare, which is one of the advantages of the United States over Japan in the Pacific Ocean. This is a key thing. Although the United States can mass-produce cruisers, the shipborne radar of the British Empire is a key thing. Britain has centuries of war experience and war technology, so its advantages complement those of the United States ... (British technology can be mass-produced in industrial America, but other countries do not have such conditions, so Britain is not in Eurasia. The United States has an overwhelming advantage in materials, which has been effectively suppressed in Germany and Soviet Russia on the main continent for decades. Of course, the industrialized United States quickly absorbed this kind of thing ... From the late World War II to the Cold War, 90% of the expenditure of the United States was on the side of Britain and the United States, so the original big country stood on the side and it was really unable (and unnecessary) to maintain this kind of expenditure ... So the United States became powerful and small-when Britain, France and Germany tug-of-war in front of science and technology, the United States had become.