> No, the startup scene is a side effect of a lot of money floating around in a place where there is little job security and surplus of people ready to gamble a couple of years of their life in return for a very small chance at success.

That makes no sense. Did Gordon Moore have insufficient job security at Fairchild, so be went and founded Intel? Startup founders are disproportionately from the upper middle class—people who have plenty of security in the US.

> Consider also that inside the United States many places have already tried to imitate SV and it didn't work there either, and yet, the economic, political and social conditions were identical.

Other places in the US can’t imitate SV because of freedom of movement. There are zero barriers to relocating from any part of the US to any other part. So people who want to do a certain kind of tech startup relocate to SV to maximize their chances. The economic and social conditions in the rest of the country don’t really matter. (Which is why government efforts to try and become the next SV are destined to fail.)

Why is American country music concentrated in Nashville? The musicians are from everywhere, (but they move to Nashville). The major record labels are in New York or LA, and so is the capital. What’s special about Nashville?

Silicon Valley and Nashville are best understood as markets. They’re markets for connecting capital to talent. If you want to sell your startup idea (or music act) to investors you go to where the biggest market is, for the same reason you sell your used laptop on eBay instead of somewhere else.