We are the 50-most populous in the world, and many of the most populous above us are either horribly overcrowded and suffer socially as a result (Japan, Hong Kong), Micro-Stare or Enclaves (Monaco, Gibraltar, the Vatican), or tiny Island nations (Bermuda, Malta).
At the same time there are ~30 fewer people per square kilometre in Germany and ~120 fewer in France.
Let me give you a concrete example. I live in the City of Exeter, I have friends living in the village of Pinhoe, it's about an hour's walk between the two but over the last four years that walk has gone from about 50% fields to 25% fields and dropping. In another five years Exeter will effectively swallow Pinhoe whole.
https://www.google.co.uk/maps/@50.74.../data=!3m1!1e3
Google Earth actually shows you the bit under development, you can actually see the boundaries between village and city being blurred.
Bookmarks