The End of Optimism

When people drop rational optimism, they don't often become skeptical or historical. So then you had Nazism and Bolshevism. And Catholicism was a kind of radical version of optimism. What did it produce? Partral, unending sorrow. And the millions of deaths. In particular, as it happens in Ukraine,. And particularly in Ukraine, of course, and also in the... so they haven't forgotten?