And there was Nixon, who was busy trying to convince the world he was a madman willing to launch a nuclear strike to get what he wanted: https://en.wikipedia.org/wiki/Madman_theory#Richard_Nixon
Perhaps is just isn’t as visible now - but it seems like back channels keep getting intentionally shut.
The Cold War featured American and Soviet pilots shooting at each other during the Korean War, supplying arms isn't nearly as big an escalation as supplying fighters.
But then it turned out that Ukraine was more prepared than Russian intelligence thought, and Europe started flooding it with weapons. Given that Russia isn't taking the war half as seriously[1] as Ukraine is, none of what's happening is irrational or surprising.
[1] By design. Putin didn't want an existential conflict that required actual sacrifice on the part of his constituents, he just wanted an easy victory to cement his popularity. He's now stuck in a situation where he has few good options.
He was afraid of the Army, which is why it always treated it like shit, except for vanity projects.
Which is why they have hypersonic missiles and nuclear powered torpedoes, but no socks, uniforms and guns for recruits.
Book: The Steel Flea, Nikolai Leskov, 1881
Not really. I recommend talking to Russians of certain age. What they say is something like "sure, Putin is far from perfect, but he saved us from the 90's"
I don't think most people understand how bad things were there after the wall fall. The usual human reaction is turn to a strong man that put some order in the chaos.
This is stupid strategy. Military men millennia ago were beyond it. The fog of war is real. One maintains exit ramps. Fully committing at the onset of a war you unilaterally start is blunder, full stop.
Part is the fundamental weakness of dictatorship, a weakness our ancestors addressed with monarchy. (Bush and Nixon could walk away from failed wars their successors wrapped up without fear for their lives. As could Roman consuls.) But a larger part is broad stupidity, concentrated at the Kremlin.
It is like a bio-weapon and will eventually take out your own troops.
You also seem to be purposefully misinterpreting the OP's point about what is being considered "casual". Whether you think Putin is irrational or not has no bearing on the fact that most of our leaders seem to be treating a potential nuclear war after decades of shuttle diplomacy indeed very casually.
If the US attacked Canada because China overthrew the government, installed a pro-Chinese president, and started making stronger legal pacts, bonds, and certifications with China would that be irrational?
Being anti war is fine, and amicable. But don’t get it twisted. Putin is acting rationally
The first problem is that this "analogy" is not an accurate parallel to what happened in Ukraine. The US had no boots on the ground whatsoever.
There were mass protests, and then the elected parliament removed the president. Later, the people by a wide margin freely elected the current president, who is ardently against Russian interference.
There's not a democratic outcome here where "China" is illegitimately foisted upon the people of Canada.
No, because the US has the capability to invade Canada.
What's irrational about Putin is the self-defeating nature of his decision making. Both self-defeating for his country, as well as for the stability of his regime which translates into his personal safety.
He's embarrassed himself and his country, pushed Ukraine more towards the West, and achieved none of his strategic objectives.
I hope he is just behaving irrationally because of bad advice. The alternatives are more scary, because then the madman thing might not be an act.
But it's not even close to an exhaustive explanation. The Ukrainians have agency, they have their own media ecosystem, they are capable of forming their own opinions. They saw Putin as the dictatorial thug that he is. Putin achieved that by himself by invading Georgia, poisoning his opponents overseas, rigging elections and assassinating journalists.
Anyways, this isn't relevant to the question of Putin's rationality.
At this point the war is continuing purely to fuel the ego of a dying dictator.
Russia isn't, and doesn't. Russia isn't even close. So it uses political subversion instead of outright militarism. Which - it turns out - is possibly the one domain where it's competitive with the US. For not all that much money, some info war campaigns, and the help of internal allies, Russia almost got itself a two term president with eyes on a permanent dictatorship.
Nice plan. Didn't quite work.
But Putin decided to go ahead anyway. Which is insane. Every single goal - weakening NATO, weakening the EU, building closer relationships with China, India, and Turkey, strengthening Russia internally, cementing his own position in history as Tsar Vladimir I, saviour of the Empire - has failed, disastrously and counterproductively.
So now Putin has two choices. Admit defeat and have an unfortunate accident with a window, or burn everything to the ground out of spite and frustration.
He's not going for Option 1. So it's up to everyone else to make sure Option 2 doesn't happen.
I assume he's talking about the US and the UK strong-arming Ukraine away from peace talks that had a chance at ending this conflict back in May. All the hawkish talk from Biden this whole time has been about dethroning Putin, leaving no face-saving diplomatic exit for him except escalation between nuclear powers, and that's exactly what's happening. The lessons of the past 70 years have gone out the window.