I realize I may get some divisive answers, but if NATO Countries all agreed, mobilized, and went into Russia full force with no warning, what are the likely outcomes?

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...

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 The truth is that war is obsolete as a means of accomplishing 99% of political goals.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.

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

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

The End of the World

what are the likely outcomes?

Putin launches nukes, huge amount of civilians die, russian military is crushed within next few months. NATO wins at the cost of horrible loss of civilians killed by russian nukes. World economy shrinks considerably

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.

For more humorous (but still serious) answers try asking in !noncredibledefense@sh.itjust.works

About those nukes…

For starters: amassing troops at the russian is a warning.

But I think a coordinated attack by NATO could neutralize all russian air power, at least in the western part. Thus preventing Russia from waging war in Ukraine or making any attacks on NATO countries in return.

Nuclear war is not plausible due to Mutual Assured Destruction.

Russia is obliterated shortly followed by Russian nukes shortly followed by the end of humanity as a speicies.

Everyone I've read here is talking about Russia immediately launching their nukes, but among so many nations, surely several would think to do something sneaky to disarm the nukes before anyone launches a full-on attack against Russia.