I did a fair bit of looking into how folks survived the great depression, things they did to get what they needed when they didn't have any money. Communities really started to come together during that time, groups of people had a common denominator of being broke and unemployed. In those groups there would be a wide variety of valuable skills, women who could sow, farming, fixing things, building things, various people with access to various other things needed that they could salvage and repurpose. Someone would have chickens, turkeys, goats, and kids would raise rabbits for meat. They established barter systems between them of trading things they specialized in for things they didn't have. Trade eggs for vegetables, fruit fruit for clothes, shoes, trade some manual labor here for some help there. They took care of each other as that's what was necessary for everyone to survive. Taking care of the good neighbor means that work can be split between the two families, which means that instead of you and your family having to have someone awake 24x7, now you can get some rest, and get some other work done to help your survival. Add more neighbors and it gets even better.
If things get dicey, some folks are going to be so upset that the world isn't what it was any longer, and they'll just lay down and die essentially. And then you'll have tough people that will adapt, and overcome, and survive what the world has become. You really don't know which person you yourself will be until it happens.
It is pretty scary to think about what someone who could have been your best friend for decades, will do to you when their kids are starving, and they know you have the means to feed theirs. I often think about how far I would be willing to go to feed my kids if the situation were desperate enough.
Branden