One possible change may have been the creation of the State of Israel where Holocaust survivor could create a home of their own and where they could proclaim "Never Again".
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The Holocaust began when the head of Germany, who was Adolf Hitler wanted to get rid of all the people he did not like. In his werds he put it that the Jews were the reason why the Germans lost WWI....
You were not quite clear with your question, so i am assuming it is how other countries affected US history. First our political system. The Greeks were the first to create a Senate, in which we...