Current developments in sustainable subsistence farming methods are the best ever because we have the Internet and massive fast communication to combine most of the best methods from everywhere.

Part of the issue why a lot of the sustainable stone age methods of the Native Americans have not been at the forefront of this is that they had pretty high land to people ratios. Lots of land used to feed not that many people. That, and the general population was usually made up of relatively short lived but otherwise very healthy and physically capable people.

Out situation is that we have to consider feeding and self sustainability for people with extended lifespans who can be "active" well into their 80s, but not highly physically capable, not at the level of running down a deer or hiking a five mile circuit daily to stop at batches of mushrooms, berries and squash for the daily meals. Yes, a few 80 year olds do that, but not the majority.

The real formula on this is to have roughly a year's worth of stored food per person with maybe two weeks to a month's worth of that supply as regular grocery store and comfort foods, the rest being long term storage stuff then if a situation lasts longer than that, you transition to the more deluxe freeze dried and preserved stuff, then after that, the cheaper long term freeze dried storage food and then the Mormon Cannery stuff which is mainly food staples which still need some supplementation that we would expect someone to accomplish with gardening, gathering, hunting and trade.

In the midst of that, you are on that time schedule to get relocated to a sustainable farming situation or solidify some connections with one since if you can manage to survive that long, some sort of economy is likely to re-emerge in the form of people selling and trading their own surplus food production of some sort.

I like the idea of planting renewable food crop items whenever someone is out in a wild or semi-wild area, even in unused land around the cities. A few years ago someone had planted some cherry tomatoes at the far end of our commuter train line, and when left wild, the bushes grew massive.

Here in Portland, at least in the decent weather seasons, nobody starves unless they are just plain stupid and crazy, but stupid or crazy, you can probably still get by. We don't have regulations against front yard food gardening and a lot of people grow more than they ever use so they get into a program where volunteers come by to harvest the surplus and then take it to food banks. Even then, there are not enough volunteers to handle it and a lot of fruit trees go unharvested, with pears, plums and apples just falling to the ground which gives us a little bit of a rat problem, but then the rats do so well outdoors that they don't get hard core about invading the houses.