- Size: It is the 3rd largest in area and population. The two countries bigger than the US – Russia and Canada have way too much unusable land. The 2 countries bigger than the US in population – India and China are still climbing up from the colossal destruction faced in the 19th century – early 20th century and also face severe resource constraints. Russia has still not settled in terms of governance. Australia & Canada have too few people. That leaves the US in a nice sweet spot.