This [the Holocaust] must never happen again. ... Be vigilant about your rights. Care about the rights and human dignity of others.
When the rights of any group, no matter how small, no matter how marginal, are violated, your liberty, your freedom is put at risk. Let there never be a day when we cast about in horror and have to ask the question, "How did it ever come to this?"
- Thomas Childers, Ph.D., Professor of History, University of Pennsylvania, in the closing remarks of his six-hour Teaching Company audio lecture series A History of Hitler’s Empire