> Density is attractive to individuals who want to exploit as many other people as efficiently as possible. > For example, in the downtown areas of Canada's de

> Density is attractive to individuals who want to exploit as many other people as efficiently as possible. > For example, in the downtown areas of Canada's densest cities, before smartphones, about 90-95% of random strangers coming up to me wanted money either as beggars or seeking donations for some "charity". The other 5-10% would generally be asking for directions or the time. That's selection bias. You are interacting with the most desperate, entrepreneurial, and lost people, who are not a random and unbiased sample of the whole city.