Moreover, humans have not fully utilized the remaining thirty percent of land, for example in places like Antarctica.
There are also many countries with very low population density, where most of the land is essentially deserted wilderness.
Only a few countries have completely utilized all their land area, such as Monaco. As the country with the highest population density in the world, Monaco, occupying only 2.02 square kilometers, houses over 39,000 people.
And even though this population density is already very exaggerated, it still doesn't compare to Macau, China, which is the city with the highest population density in the world, with a density as high as 21,000 people per square kilometer.
With such population density, it is actually still very livable; if social order is maintained well and travel is staggered, each person can actually have enough living space.
