http://kids.britannica.com/comptons/art-166536/Population-density-of-North-America http://kids.britannica.com/comptons/art-166536/Population-de... Note the pop

http://kids.britannica.com/comptons/art-166536/Population-density-of-North-America http://kids.britannica.com/comptons/art-166536/Population-de... Note the population density in relation to bodies of water. It has less to do with borders than you seem to think.