A <span>major concern of scientists who left Nazi Germany for the United States before World War II was that the new Nazi party would heavily persecute the Jews--many of whom held positions in the realm of science. They were correct. </span>
The USSR's (Soviet Union) economy was based on a communist ideology. In this political/economical situation, all property is publicly owned and each person is worked and paid according to their ability and needs. There are two classes included in this system, the working class that runs the system and the capitalist class that derive profit from employing the working class majority. In this case, the capitalist class would be the government who is given the right to decide the allocation of resources, products, and services and who they will be provided too. This was in contrast to the economy other United States because the US believed in a free market free from government control.
A Roosevelt hinted that the US could not always remain neutral......