Vegas has water from the Colorado River. Prior to the introduction of gambling, it was tiny. The population in 1940 was a bit over 8,000. Even after the introduction of gambling, it still had less than 25,000 inhabitants in 1950. But gambling is really profitable (for the casinos) and the money drew more people and it has grown, using Colorado river water. If gambling get turned off, it will shrink really fast and will be a tiny fraction of its current size in a few years.
Vegas was founded where it was first by Mormons as a sort of rest stop hzlfway along a trade route. It got built up when the railroad was being laid down through there.
I would guess that for cities like vegas, they’re built less for the perfection of where they specifically are, and more because they happen to be convenient for another purpose
Las Vegas actually means The Meadows in Spanish. It wasn’t a barren desert when it was settled but rather grasslands fed by natural springs (the Las Vegas Springs).
Phoenix is similar. It sits along the Salt River and that river created a pretty fertile valley that supported agriculture.
So yes, while these cities are massive metropolises bc of aqueducts etc, the premise that they didn’t have water or vegetation when they were settled isn’t true.
Southern Arizona used to have running water. Rivers like the Gila provided water and habitat until large-scale irrigation dried them out. Cotton , citrus, and cattle are thirsty crops. The Hohokam lived in the PHX area for two thousand years and created 135 miles of irrigation canals. The Tucson area has also been continuously inhabited for thousands of years.
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