FOR YOUR CONSIDERATION 

A phrase that has come to be almost ubiquitous is:

 "As more and more of us move into cities."

And I believe that is accurate, but you should confirm it for yourself.

If true, as I believe it is, then aren't we building our own prisons and voluntarily incarcerating ourselves?

I'm anxious to read in the comment section another point of view on the migration from rural to city.