During the age of Atlantis, the low population density and the resulting purity of the earth's aura, made conditions ideal for discovering secret meditation techniques.
— Frederick Lenz
Delightful Population Density quotations
...there is an optimal balance, depending on the manner of man's life, between the density of human population and the tolerances of nature. This balance, in the case of the United States would seem to me to have been surpassed when the American population reached, at a very maximum, two hundred million people, and perhaps a good deal less.

I was in Taiwan recently and was completely amazed by the density of population.
It makes New York look like no one is out on the streets.

I would hate to see the state of Wisconsin make another mistake and locate another casino in a high-density population area
The disadvantages of a decentralized, spread out urban area are tremendous, and the environmental damage of urban sprawl cannot be ignored. As a large city, Tokyo must be used more efficiently and the population density increased.
Less cars on the road means productivity and jobs growth, as it allows for the more efficient movement of goods and services and encourages greater urban population density.

In Hong Kong there is agglomeration beyond my fondest imaginings.
The Kowloon district claims a population density four times that of New York City.
The density of human population combined with the development of powerful and largely unconstrained technology has given us the problems of the anthropocene and the serious possibility of self-caused extinction.
In Europe, it's common to hear about young professionals living with their parents. With the continent's high rents and taxes and its population density, it makes sense.
By the mid 1970s, the great downtown bookstores had begun to disappear as their customers migrated from city to suburb where population density was too thin to support major backlist retailers.
Spend time alone in areas of low population density, where you can feel the stillness. Go out into the desert or up into the mountains or to the ocean where there aren't too many people.