I am looking through several scenarios here. It would take me a long time to dump all of it into a written form, so I’ll just do an abbreviated version.
Low-probability option, war fizzles out because America runs out of time, and Pentagon decides against the nuclear option for some reason. Funding for the CIA political control projects worldwide runs dry due to total economic collapse. The opposition to the installed and controlled politicians and media grows and grass-roots political options form, but the populace is mentally and emotionally weakened by the Internet hypnosis and is not capable of reversing the fatal economic trends quickly enough to avoid collapse. Welfare financing of Muslims and Africans in Europe ceases due to economic collapse, and they enter a state of perpetual riot outside of the rule of law. Collapse of the petrochemical industry leads to the collapse of the food supply, energetic sector and transportation. America and Europe descend into chaos, with various degrees of kinetic conflict and a paradoxical combination of anarchy and totalitarianism. Russia pacifies Ukraine, and it turns out that without America, all the current hot-spots of conflict suddenly cease to be a problem. Israel is in a desperate situation of either brokering a harmful peace or being destroyed. China replaces the USA with the rest of the world as a market, but the volume of trade scales down significantly due to deindustrialization and impoverishment of the major centres. Taiwan was only ever a problem because of America. Japan suffers a terrible economic collapse. South Korea reintegrates with the North. America and Europe are violent, poor, vicious shitholes sidelined by history.
Low probability option, war escalates to the point of ten million dead but then shock and panic force America to de-escalate. Russia establishes total victory in Ukraine. Poland enters the conflict with 300k troops. Russia responds with an extremely vicious counter-attack, inflicting over 70% casualties on NATO within the first week. American bases in Poland and Germany are destroyed. America responds by attempting a decapitation attack against Russian leadership. This results in several high military officers killed, and the Russians respond by destroying the entirety of American military with nuclear strikes. All the Ohio nuclear submarines are sunk, all the shipyards are destroyed, all the military bases are destroyed, all the aircraft carriers are sunk, CIA HQ and Pentagon are destroyed, America launches an attempted nuclear response, Russia takes down 90% of the ICBMs, Russia loses several major bases and industrial cities. Russia issues an ultimatum, requesting American unconditional surrender or total nuclear retaliation will ensue. Since most of the Russian nuclear forces are intact and most of American nuclear forces are destroyed, America stands down and surrenders.
Extremely low probability option, something unexpected happens and disrupts everybody’s plans – supervolcano, aliens, asteroid, supernova, extreme onset of the ice age or whatever. Since the parameters are unknown, precise modelling isn’t possible.
High probability option, same as above but the Russians are more heavily compromised and shaken, and launch total nuclear retaliation without even attempting a political outcome. Several hundred warheads of 100kT or above pepper American cities, industrial and military installations. Tens of millions dead within days, hundreds of millions dead within the year. Russia and China lost most military and industrial installations and all major cities. UK is completely devastated and its population dies off. Several major points in Europe suffer the same fate. Total collapse of the Internet, total collapse of world trade and finances. Predictive ability past this point lost due to chaos.
Cumulative probability of “good outcomes” is below 10%, but those include totalitarian governmental/corporate/AI control over the populace and a complete loss of freedom, so “good outcomes” might be a misnomer. Probability of Western economic collapse within the timeframe of 5 years is over 99%. Probability of Western civilization recovering to pre-2019 normal is zero. Probability of nuclear exchange within the timeframe of a year is over 80%. Probability of nuclear exchange within a month is over 20%, but then starts growing as several parameters simultaneously converge to the critical points. The main critical point is the collapse of American control over the global economy, and resultant loss of American military budget, creating a “use it or lose it” situation for the people behind this entire mess. In this scenario, it is over 90% likely for them to use the nuclear option to degrade the rest of the world and give the collapsed America a chance of recovering ahead of others, according to the original plan. The likelihood of them proceeding with the plan is exceedingly high because we’ve been living in this scenario since at least 2008, and likely longer.
America (but I can’t eliminate the possibility that sources of power in UK, Israel and elsewhere participate in the problem) still controls the entire roadmap, but approaches the point where they aggravate other actors to the point of no return.
Probability of the sudden global glaciation is showing a non-null percentage within the timeframe of a century, so that too is a “dark horse” to be mindful of. This is due to extreme winter events in North America and indications of permafrost melting in Siberia, which indicates climate approaching the conditions in the last glacial phase. Also, the Sun has been acting strangely, departing from its usual 11-year cycle, which still doesn’t feature significantly in my analysis but it’s something I’m keeping an eye on.