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Small-Scale Question Sunday for May 26, 2024

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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Moving stuff by boat is a lot more efficient than moving it by land, meaning you can support more people in one place, and easily ship raw goods in and manufactured products out. Not to mention that it's easier to reinforce and defend coastal settlements from barbaric hill people in the "interior". There's often a city near a river's mouth, and another where the river becomes impassable to ocean-going boats (and there's often a portage there, if the river is still navigable on the other side). Alternatively, bridges and fords can serve the same purpose: I think London was the site of a ford, which the Romans built a bridge across. Also, I recently ran across a video about how Lewiston in Idaho is a Pacific sea port.

For the Roman empire (pre- and post-), here's a map of travel times and an ACOUP post about grain shipments, trade, and wealth equilibria.

I think Southern India had a cool bit of luck, in that if you sailed down the Red Sea and continued east out the Gulf of Aden past the Horn of Africa, you'd end up in Thiruvananthapuram. So they got Greek travelers, and Arab traders by sea (instead of Arab conquerors by land), plus two separate colonies of Jews fleeing disasters in Judea.

For east Europe, we can notice the Baltic Sea area had a different climate, too.

For China, look at the history of the Grand Canal.

For exceptions, maybe Persia and modern Switzerland might count? West Virginia is kind of the opposite of an exception.

Switzerland controlled mountain passes between Italy and Germany. Shipping by sea might be cheaper, but sailing all the way from Genoa to the mouth of the Rhine is still more expensive that travelling across the Alps to Basel and sailing down the Rhine.