2015, Nils Petter Gleditsch, Nils Petter Gleditsch: Pioneer in the Analysis of War and Peace (Springer, →ISBN), page 153:
On the other hand, the fact that we have not had two or more Holocausts in recent decades can still be seen as an indication of progress ...
2005, David Edwin Harrell Jr., Edwin S. Gaustad, John B. Boles, Sally Foreman Griffith, Unto a Good Land: A History of the American People (Wm. B. Eerdmans Publishing, →ISBN), page 987:
There they hammered out the charter of the new collective security organization that Americans overwhelmingly hoped would succeed where the League of Nations had failed — to prevent aggression and ensure that there were no more wars and no more Holocausts.