If you divide the world population by the UK's area, you get 80,700 people/mile², which is slightly less than the population density of Mumbai, and only 13% hig

If you divide the world population by the UK's area, you get 80,700 people/mile², which is slightly less than the population density of Mumbai, and only 13% higher than Manhattan. You might consider that "unreasonable," but it's not unlivable, or anything.