The Holocaust has changed History because it was a time period when there was tense rivalry between countries, there were many Contraction camps and many life's were lost then.
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....
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".
it lowered the population, which helped the world because if it didnt happen then we would be overlowing with people. and the world woul be so difrent we couldn't handle anything