No other advanced, populous country will see such diversity. In fact, most of America’s net population growth will ... found that density does not, as is often assumed, increase social contact ...

While it's hard to measure levels of niceness, the least-friendly states in the country according to visitors have one big similarity that's easy to notice.

This article was originally published with the title “ Population Density and Social Pathology ” in Scientific American Magazine Vol. 206 No. 2 (February 1962), p. 139 doi:10.1038 ...

Because of this, exponential growth may apply to populations establishing new environments, during transient, favorable conditions, and by populations with low initial population density.