In his elegiac memoir The World of Yesterday, which he wrote while in exile from the Nazis, the Austrian writer Stefan Zweig observed that most people cannot comprehend the prospect of catastrophic changes in their situation. Things can get incrementally worse for a long time without prompting a reaction. Once catastrophe strikes, it is too late to act.Dramatic changes are occurring in our times, too, and we must hope that it is not yet too late to address them.