Largest Lithium Reserve Discovered Beneath California's Salton Sea

Being a massive country really is a civilisation cheat code.

Russia is the same - massive material resources already known, plus greater chance of future discoveries simply because of the greater coverage. India, Brazil, Australia, Canada - all these countries are almost guaranteed to have material abundance.

US I think have got to be the most overpowered, especially since the annexation of Hawaii extends the territory way out into the Pacific.