The main factor regarding the <span>United States dominating the world economy after the world war 2 was that it was a highly industrialized nation, and had not been "touched" by the war physically due to its isolation between two major oceans. </span>
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This is all stuff that you have to do on ur own... becasue i can't write you an essay
Congress can check the branches. Congress makes sure that the power stays equal between each branch