The United States maintained neutrality up until the point where Japan bombed Pearl Harbor. After that, it was impossible for the US to keep to itself.
it was the executive meeting for the colonies
The main reason why the British government relax rules regulating trade for the American colonies in the late 1600s was because some colonists were getting upset and the British wanted to keep them loyal.
It had a very positive impact because the 1920's was when many new technologies were introduced, one example being the the assembly line, which made many industries more productive and profitable.
Hope that helps!
