Life expectancy tends to go up as population densities increase. On top of that, people's environmental footprints shrink. We can talk about all the specific c

Life expectancy tends to go up as population densities increase. On top of that, people's environmental footprints shrink. We can talk about all the specific cases where people lost something as the older character of the city made way for the new, but on the balance, there must be more cases of lives improving, than degrading, when we see not only gains in average income and life expectancy, but more people able to live in the cities that provide these superior conditions. Consider that Hong Kong now has the highest life expectancy in the world: https://www.cnn.com/2018/03/02/health/hong-kong-world-longest-life-expectancy-longevity-intl/index.html https://www.cnn.com/2018/03/02/health/hong-kong-world-longes...