I mention this just to illustrate how even the big enterprises of our life and culture are very fragile. We plan and we save and we build, and things look good and successful, and then it starts to collapse. And we can't believe it. Nobody comes to shop. Nobody rents the office space.
Retailers begin to leave.
The streets are deserted. The hotels can't pull the conventions. The pushers move in. The gangs take over. And pretty soon the unthinkable has happened.