Unfortunately psychopaths like putin never learned that lesson.Because we all know about Nuclear Apocalypse staring humans in the face.
Or Should.It was standard reading in my era for a Freshman or sophomore in High School
to read - Hiroshima - by John Hershey.A mere 160 pages.
But important,every single page.Because it deals with mankind.
And it's immediate extermination.From out of nowhere.Faster than any
Speeding bullet like Superman.Was Fat Man and Little Boy.
Supposedly ... Lesson learned.