Society collapsing isn't the root cause.
What is causing society to collapse, and why? If society is incapable of producing people strong enough to resist the rigours and suffering that it manifests - why?
What decisions and incisions have been made on people's rights, their ability to be independent, to have agency, and to thrive? There's always another layer below the cause.
There's always something. To use a poor example - the proliferation of green cars after the World Wars - because green paint was in supply following the World Wars.
People probably still like green cars today, but that's a choice that for the most part, is removed from people. It won't make them homeless - (or maybe it would, because the green paint factory has no more jobs) - but it is one of the many, layered variables that makes society what it is now.
If we an ill species, what medication do we need to become well again? Or are we about to witness the fall of Rome / Babylon / Other Great City / Era again?
I know what you are getting at, but you are missing the point. Society collapsing doesn't have a root cause, it has multiple causes. I talk about many of the ones that I see, but there is no point in listing out a million causes that add to the whole in this case.
We can address those million root causes, as a society. We have billions of people. :)
They can each solve a problem, or contribute to the solutions that would benefit many others.
We have to start with the ones that disadvantage people the most, and work our way down, until there's a shorter list.
Perhaps I am being too utopian and optimistic.
It is easy. Stop buying shit from them.