" An event of great agony is bearable only in the belief that it will bring about a better world. When it does not, as in the aftermath of another vast calamity in 1914–18, disillusion is deep and moves on to self-doubt and self-disgust. In creating a climate for pessimism, the Black Death was the equivalent of the First World War, although it took fifty years for the psychological effects to develop. "

― Barbara W. Tuchman , A Distant Mirror: The Calamitous 14th Century