[TechBro8615]

> Maybe there is some type of awful natural law to be found even?

Maybe. You've got two examples so far. Can you go even further back? Which cities were industrial hubs prior to Silicon Valley and Detroit, and what became of them?

Mill towns from the industrial revolution come to mind. Factories and boarding houses created such thriving industry that towns literally spawned around them, but within decades they transformed into abandoned buildings in towns devoid of any economic opportunity.