Elie Wiesel said this quote

At the time of the liberation of the camps, I remember, we were convinced that after Auschwitz there would be no more wars, no more racism, no more hatred, no more anti-Semitism. We were wrong. This produced a feeling close to despair. For if Auschwitz could not cure mankind of racism, was there any chance of success ever? The fact is, the world has learned nothing. Otherwise, how is one to comprehend the atrocities committed in Cambodia, Rwanda, Bosnia…