One thing left out of this analysis of oil availability is all the places where the incentive structure has not resulted in the exploitation of easier to access oil. E.g. places where land owners have no mineral rights and oil exploration and exploitation by the government is a major negative, and the government isn't strong enough to get around lots of these land owners. I think Argentina is one of the classic examples of such a nation.
There's also coal -> oil, if you've got some hydrogen handy.
As for "every resource we use", you've got to separate the ones we "use up" like fuel, and ones that are still available after use, like most metals. E.g. access to iron/steel and copper will be trivial, just mine ruined cities, land fills, etc. etc.
I can't say with 100% confidence this would work out, but I know the sort of people our betters despise will roll up their sleeves and give it a try.
> There's also coal -> oil, if you've got some hydrogen handy.
Which only works if you already have a technological civilization. The Germans were able to do this because they already had a large industrial base.
The South Africans were able to do this because they had an industrial base, and could find expertise internationally if needed.
If you're living with 19th century technology (16th century?) you don't get to do coal-to-oil.
These problems simply aren't solvable in the situation we're talking about, and you seem to mistake the fact that you can think of solutions for them with 21st century technology means they are universally solvable. That's not even close to true.
Obviously I disagree, but I can't believe I forgot the #1 easiest way to bootstrap: hydroelectric power. Unless the disaster is so great it destroys all these dams, multiple groups of people have the potential for a perhaps small, but generally reliable source of electricity. From that you can build back everything.
Anyway, there's nothing stopping you from believing it's impossible, and ... what will you and yours do after a sufficiently big disaster? All I know is me and mine won't lie down and die.
There's also coal -> oil, if you've got some hydrogen handy.
As for "every resource we use", you've got to separate the ones we "use up" like fuel, and ones that are still available after use, like most metals. E.g. access to iron/steel and copper will be trivial, just mine ruined cities, land fills, etc. etc.
I can't say with 100% confidence this would work out, but I know the sort of people our betters despise will roll up their sleeves and give it a try.