Most people will starve when the supplies run out . Very, very few have the ability to raise, grow, gather and preserve enough calories to sustain life over an extended period of time.
Stocks of canning lids, salt, seeds, animal feed, vinegar and such won’t last long.
The book “A Failure of Civility” is excellent. It is out of print, but a web search will turn up sites where a PDF version can be downloaded.
“Most people will starve when the supplies run out .”
99.999% of so-called survivalists have never tried living out in the bush with no power, while sustaining themselves on a one-acre garden.
They will starve to death when the supplies run out.