Much of the post-world war i economic boom was due to the federal government's policy of

In the US, from the New Deal, a plan employed by President-elect Franklin Roosevelt, put a brief stop to the depression. Faced with huge unemployment and possible social uncontrollability, the government made the state intervene in the economy, creating major infrastructure works, unemployment pay, worker assistance and lending. However, the United States was only able to resume its economic growth with the start of arms production for World War II in late 1940.

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