I was having fun playing with the map overlay of the United States versus Europe, and commented to my husband that it was amazing just how much an impact England had on world history, considering its size, and he reminded me to consider population density. England's is something like 674, the United States' is like 88. Maryland is somewhat comparable at 595 (I grew up in Maryland), which makes sense, as Maryland does have expanses of horse farms, forest, etc., but they just aren't huge wide endless expanses like you see in the western U.S.