Something else I have thought about on this subject. Look at some of these post apocalyptic movies where you have scattered people living in these former citie

Something else I have thought about on this subject. Look at some of these post apocalyptic movies where you have scattered people living in these former cities of glory. Which cities do the best? Those will access to natural resources and access to water both fresh and salt. We are always going to need fresh water to drink, and boats have been the best low tech mode of travel for thousands of years.