There is a tier of farming below that, subsistence farming, where you're keeping a few small animals and growing food for your own consumption. It's still very common outside of developed countries and cities. Although it's really a "shit hit the fan" outcome for people in developed countries and cities.
You don't need a lot of land to do that. Just 0.25 acres is enough to feed a single person. You can do it basically in a city.
If you're one person who can afford 1/4 acre in a city. If you're married, you need to afford 1/2 acre. Have a kid? 3/4 acre. That's rapidly out of reach of most people.