Reading the news stories from Kiev these days reminds me of history--small insult followed by small insult until most of Europe blundered into World War I, the war to end all wars." Or Adolf Hitler pouncing on countries too weak to resist him--Holland, Belgium, it's a long list--until he finally ran into one that wasn't--the Soviet Union. That was World War II, of course.
Since then, we've managed to avoid a third World War because of a frightening truth--that if we all go to nuclear war could we blow up the planet. And even if everyone started the war non-nuclear, wouldn't the losers at some point likely change the rules? And then wouldn't we all? We are not at the end of the road.