> The US is the opposite of "mostly flat". And large swaths of the mostly flat part have low population density. Eh? Most of the population lives in the Atlant

> The US is the opposite of "mostly flat". And large swaths of the mostly flat part have low population density. Eh? Most of the population lives in the Atlantic coastal, Gulf coastal, and Midwest plains. Only a minority of Americans live in places that could be considered "mostly mountainous", methinks. Even Denver, the most populous city in (arguably) the most mountainous state, is actually a Great Plains city.