You've described most of Eastern Europe for most of the last 100 years and many parts of Asia. I came from a Polish city of 100,000, and everybody I knew (who didn't completely surround themselves by concrete) grew at least some type of fruits and vegetables in their yards, no matter the size. We knew the next big disturbance is just around the corner. Outside of vegetables and fruits directly planted in our yards, we also raised pork, and at different times, chicken, turkey, ducks. Our neighbours raised rabbits. Most people "leased" a small plot on the outskirts of the city (in our case for strawberries). Community gardens were everywhere. Now, things are slowly starting to change to mimick the West. People are even starting to grow lawns for some reason. Sad state of affairs. It seems humans believe that progress means you outsource all of the labor to somebody or something else. In my opinion, the labor itself, is the lesson. The folks that need assistance in their gardens would generally get it from family, friends, and neighbours.
My dream is to make gardens under geodesic domes. In UK there is Eden project with 2 domes: one has mediterranean climate and another tropical. Imagine being able to grow mangoes and pineapples almost anywhere (it maybe too expensive in some climates, but maybe just growing strawberries there would be nice). https://www.youtube.com/watch?v=MWr67v620kY
I'd love to figure out how to do this in such a way that some or all of the warmth for them could come from waste-heat sources. Seems like such a waste to build a dome for growing local food and then have to heat it through the night with conventional fuels.
On a side note, check out forest gardening, namely "Plants for a future" is an excellent reference/book pfaf.orgyou, the author whom I had the luck to meet had a "huge" garden nearby in Cornwall