> We have improved a lot on eliminating wars front.

Have we? After the nightmare of The War to End All Wars, did anyone in the mainstream honestly expect Europe to turn into an even bigger charnel house (~30-50 million dead) two decades later?

It's been 80 years since then, and we've not had a 'large' industrialized war since then. But we have all been living under an atomic sword of Damocles.

Do you think we're going to get to 200 years without that sword falling? What odds do you give on that (We've had many close calls since then)? How many people would die if it does fall? If in 2145, half a billion[1] people will die in nuclear fire, will we retroactively consider the brief stretch of history we live in to just be a brief ceasefire?

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[1] That would be a best case outcome for a nuclear war - a limited one, that wouldn't rise to the level of a global catastrophe.