I mean within a territory. If the global population of whomever grows however, that is not necessarily a risk, I agree.

Rich being more numerous than poor is impossible and I don’t think your argument makes any sense there. Being rich is basically being able to direct the labor of lots of poorer people. If everyone is rich nobody is rich.

The "power" of a country, however you define it, lags the population growth. China was the biggest country for decades, its power only really started exploding some 10 or 15 years ago.