I think anyone who 'rewilded' would just simply be 'wild'.
Meaning rewilding is a process, a commitment to living in nature. YOu can't 'arrive' at rewilded.
More so than 'salvaging' the leftovers of society, many societies are already possible. I don't think one needs to wait for a city to die before you can start using its parts for new processes.
You can live in nature, and still have an internet connection. I've been getting 10-15 percent of my food from foraging over the last year, for me, that's a huge middle step. I wish I was gardening, because I could really up that percentage. It's basically be my job over the next year to learn and teach new ways of eating rather than 'only' applying for food stamps. I would consider this 'gathered' food, rather than 'raised' food mostly because I have no intentions of monocropping.
A lot of money is in fact out there, for people spend on such initiatives. That's my middle way, using 'free' money to unlock the food.
I am also very concerned with the diet of civilization. Even the middle class lacks access to high-quality protein, and fresh vegetables. I'm looking at models where I believe a city could feed itself, but we would have to break people of the grain habits. That's a huge, but very doable challenge, being that paleo diets of all kinds are right in the forefront of the people's minds.
I find it most constructive to point out to myself, these days, where society resonates with the concepts of 'wild' human beings. I used to point out to myself how 'bad' things were, but then I realized I was only seeing half the story.
can't you just drink horse piss to get your insulin? I wish you wouldn't just be 'snuffed out'. I'm being silly...
And why, would we ultimately perish? People can walk, and there is food everywhere. There are probably more scouts out there than we realize, certainly there are millions of guide books in print. I think just because people aren't doing it now, doesn't mean they wouldn't aggressively change their tactics in the face of starvation. I also think people would help each other, and in the process of forming a group think, I believe we have at least come to the realization that peace is in our rational best interest.
But, hey, living a zombie movie would be fun, too? Nah, I'd rather go with the positive assumptions, rather than the negative ones. It's just what I need to survive day-to-day, I guess...