Welcome… to the World of Tomorrow!!! It’s a shithole. The old world is gone. Society has collapsed and bands of raiders roam the wastes. If you want to live securely, you need to live in an arcology.
What is an arcology? An arcology is a city-building. It is completely self sustaining. Growing food, providing oxygen and clean water. That doesn’t mean, of course, that life in an arcology is perfect. There is still crime. And slavery.