That's FAR too serious for this threadDepends entirely on the scenario. We live in a resource rich world. If society collapses in such a way that large swaths of humans die, the resources will still be sitting there with nobody to deal with it. If you wanna talk about resource to human capacity, we have a HUGE number of people in the world already. How is that ratio gonna get worse if people start dying?
Not sure what scenario you're thinking of where all our buildings and forests and waste vanishes but not all the people along with it. But unless aliens start beaming our cities and farmland into space I struggle to see a SHTF scenario where there's MORE people to world resources than we're already at.