Urbanization is an increase in cities through their growth, either in more cities being created or growth within cities. Superurbanization is a new idea. It’s how some cities get the lion share of growth at the expense of other cities.
To see what I mean, look at this chart:
Source: Tech is divergent | TechCrunch
Cities are growing everywhere, as people move from rural areas. But some cities are growing much more than others.
Smaller cities are trying to do something about it, as this article shows. But in the end, we may end up with more and more supercities, and smaller cities may suffer in the same way rural areas are suffering now.