I like the general sentiment but not the worked example,.the US is only ≈4% of the global population so 10k is low balling.
I think it’s reasonable to exclude a large portion of the population that isn’t chronically connected, and English speaking. While, admittedly that’s not only the US, it’s much more than 4% with the vast majority of the world excluded.
I can see an argument for taking internet usage as a proxy for education in which case the US swells up to ≈16%.
https://en.wikipedia.org/wiki/List_of_countries_by_number_of_Internet_users
But I don’t think we can exclude non-english speakers, supervolcanoes are a global phenomena, mentos is sold in 130 countries by an Italian-Dutch corporation, and insurance traces its roots back to Chinese shipping in 3rd millenia BCE.
