> The fading of WWII in the public memory could be argued as the biggest single risk that society faces. There are too many people who just won't understand how bad and how possible total war is. There is a huge background risk that the age of abundance ends and then things get dicey.

Perhaps this is really what peace means. It is the security of being able to live and plan a life or a business without ever once worrying about "but what happens if there is a war?". The collective impact of that on psychological security and the free movement of goods, people, ideas across the world is huge.