There is a myth that the New Deal programs on their own pulled the US out of the Great Depression and created the conditions for the economic boom after World War II. As an economist, I can tell you, that is not true. In reality, it was mainly World War II that launched the boom - the massive war mobilization, the horrifying destruction and death caused by it, and then the reconstruction in its aftermath. he US was the only advanced capitalist country that was not bombed during the war.