The Why of Where

Just an incredible explanation of the how and why for cities' development and how geography dictates history. Having driven across the country a few times I've thought a lot about how much denser the eastern seaboard is than every other part of the country. To have that thought expanded to explain the development of society itself is astounding. 

On a possibly unrelated note, does anyone else suddenly have the urge to play a bit of Civilization VI. Just a couple turns.