Nato would completely overwhelm Russia, but not before nukes would fly from various places and hit major cities in the western world. In the retaliation, all of Russia would be destroyed, world in turmoil...

nuclear war

There's a problem with your premise. NATO (much like the UN) is not a military force of its own. Rather, it's an agreement between many nations, each with their own militaries. There is no NATO army. There is an agreement of the United States (with its army), the UK (with its army). Germany (with its army), etc.

Each of them could independently invade. They could even negotiate an agreement to invade. But that would have limited impact on NATO. The big thing would be that any invading country loses the agreed upon defenses of the rest.

Do you like tablewear?

Because this would create a lot of glass in a few short moments.

Assuming no one nukes the world or that all air defenses work, it’d be a mess. There’s no force in human history that can stop NATO in a traditional war. (Maybe the Mongols because they’re always the exception.) But it’s very likely China, North Korea, Iran, and others would be much harder to conquer/occupy at the same time.

It would be widespread suffering in most of the world. The truth is that war is obsolete as a means of accomplishing 99% of political goals. Most of the world would descend into chaos and civil war. Food would be scarce and in times of scarcity, the drunkest, most violent people usually end up in charge. You’d have warlordism in the vast, vast majority of the world.

The natural state of humanity isn’t trade and property rights. It’s warlords offering protection in exchange for whatever they need. No one “wins” wars in 2024. Groups like ISIS would thrive, not law and order.

It's nearly impossible to mobilize a large force quickly, or covertly. There would be plenty of warning, especially if the US is involved because there's an ocean in the way in either direction.

If Western nations decide to attack Russia, I doubt the conflict will stay limited to Russia.

• North Korea will probably support Russia militarily very quickly. They're already supplying weapons, they have a close relationship, and they're reasonably secure against counterattack because China would react very badly if NK were attacked directly.
• Iran will join with Russia, but uncertain whether Iran will actually deploy its military in Europe (probably not), or take the opportunity to pursue their own goals in the middle east while the west is distracted.
• China will probably play neutral for awhile, but continue to trade with Russia and sell them military equipment. China is circumspect, they won't jump into a conflict for ideological reasons, though they'll certainly quote ideological reasons in their propaganda. They will join the conflict when it benefits them and doesn't present extreme risk. Most likely they will pursue their own goals in the south China sea (Taiwan, Malaysia, the Philippines) while the US is busy elsewhere.

An attack from the West on Russia will balloon into a global conflict. It will be bad for everyone, even if it stays limited to conventional warfare.

It is a complete crapshoot because it all fepends on whether thechain of people between Putin and the missles are more interested in going out with him.

What I expect to happen with an invasion:

NATO invades and quickly disables a ton of Russian military objectives. This is because Russia is already flailling with Ukraine due to lack of discipline and outdated tech that theybhave mostly lost already. Plus they can't do waves of conscript tactics at a moment's notice.

Putin loses it and tries to launch the missiles knowing it is the end of hos time in power. His military advisors refuse the order and stage a coup, killing Putin and blaming NATO, then fight a half hearted conventional defense for show before negotiating a ceasefire.

But that is just my thought and the risk of a nuclear launch makes it a terrible idea to launch a surprise invasion as some nuclear sub might respond tonthe invasion if their cummunication is cut off.

Considering that Ukraine is advancing inside Russia without so much problems, probably bad, for Russia

Nuclear annihilation. Got nothing to lose at that point

Pakistan and India have enough nukes to cause major famine across the world. Russia alone has enough nukes to nearly if not surely end humanity even if only 1% of the human population were killed directly from a nuclear explosion. I think the only way NATO could take Russia is if they were to somehow disarm their nukes.

Also, we have to consider alliances. Russia and North Korea are closely aligned. If the entire world went to war with NK, it is still possible that South Korea would be devastated because they have setup their entire military to shell the fuck out of South Korea at a moment's notice and have an extensive underground tunnel system for retaliatory purposes. However, it's possible that NK would value self-preservation over maintaining it's alignment with a Russia that will definitely not exist anymore.

In a conventional war they would crush Russia. Remember when the United States captured Baghdad in a week? It would be like that. But the chances are high that Putin would start launching nukes, and then everyone loses.

I think it's more likely that Nato would quickly just storm the occupied regions of Ukraine. Would probably be less risky of a nuclear Armageddon

A lot of people are focusing on what Russia would do but this would also alarm every single country that isn't in good terms with NATO and they would also start mobilizing their armies. China, NK, and maybe even the middle east would retaliate if nato was this aggressive.

The End of the World

into Russia full force with no warning

That is wrong on so many levels.
Unthinkable.
No more than a wet dream.

Because Putin is a “So much for your fucking canoe!” kind of leader. I think most world leaders are if they have the chance. Look what we still say about France for surrendering in WW2, they get plenty of mockery despite being the very nation that helped the US exist in the first place.

So the default is that the worst of the rich and powerful like Putin have the relationship with their citizens and country that a narcissistic, severe domestic abuser has with their partner:

“If I can’t have you, no one will…”

(Canoe ref if you don’t know it, sorry for the shit site)

Short answer: the end of the world.

The resultant nuclear war would kill a good portion of Earth's population, but it's likely far more would die from the chaos of civilisation being instantly forced back to the iron age by the EMP frying every silicon transistor.

kinda depends on what china would do.

china is one of the only reasons russia is still standing on their feet. if china wanted, russia would be out of ukraine tomorrow.

nato vs china is ww3