It is worth reiterating that one of the main reasons the majority of people live in cities is because they would like to make money and improve their economic status. There are, of course, other reasons too, but making money is an enduring attractor. In Alain Bertaud's book, Order Without Design: How Markets Shape Cities, he famously argued that cities are, first and foremost, labour markets.
Because of this, the success of cities depends on their ability to harness talent and turn it into economic progress. New York City, for example, is the city it is today because it was the largest port of entry for immigrants. And because transportation costs were high at the time, people arrived in New York and stayed in New York to work and create businesses.
The same thing is generally true today in the San Francisco Bay Area. It is estimated that roughly 50% of all tech startups and 59 of the top 100 highest-valued unicorns have a foreign-born founder. (I'd love to know what percentage are Canadian graduates of the University of Waterloo.) These are immigrants looking for money and economic opportunity, and the local ecosystem is providing the right preconditions.
But if the preconditions for success disappear, people will start to both leave and not come in the first place. So, it's also worth reiterating that the fortunes of cities have always risen and fallen over a long enough time horizon. Here's a great excerpt from a
