I have lived long enough to remember the days when we did drills at school not for active shooters but for nuclear attack, covering our heads and kneeling in the elementary school center hall against the windowless walls rehearsing for Armageddon. I was a Cold Warrior, sailing the seas with I can neither confirm nor deny in TLAM launchers. I was told history has ended but here it is again.
The truth is we have always lived on a knife blade, but we only can do so by holding the conflicting ideas in our mind that we are both on a knife blade and living. Existing requires both optimism and realism.