The Collapse of the American Empire, page-1573

https://en.wikipedia.org/wiki/List_of_sovereign_states_and_dependencies_by_total_fertility_rate

Aus, USA & UK have similar fertikity rates (births per woman)

PS : China and India have had big populations a thousand years ago
compared to Eorope and of course the "New World" was not yer colonised then.



When it comes to population, we're "the Johny come latelies"