If history teaches us anything, it is that acting like “everything is up for grabs” is precisely what produces reigns of terror.
Over at the Volokh Conspiracy, Sasha Volokh quotes the lines from Shakespeare about the soothsayer warning Caesar of the Ides from Act I, Scene 2. Great and timely. But I like more the later exchange from Act III, Scene 1, when Caesar, on the Ides of March, sees the soothsayer, and says:
[To the Soothsayer] The ides of March are come.
Ay, Caesar; but not gone.