Earlier quoted context omitted.
I've been to Cuba. There are old cities in the Spanish style, and new ones (1950s) in the american style. In the spanish cities you can walk comfortably. The buildings are tall enough and near enough to the sidewalk that you can always find shade. And everyone walks on the shaded side of the street. In the american cities the buildings are set back, and there is no shade. People still walk (they're poor), but there a…
Walking has never been feasible in the South US. It works in Cuba because Cuba is a small island with a lot of people. Density is forced, so you don’t need a car to get to everything — thus your walking trips are 10-20 minutes long. Living in the south, it would take me 15 minutes walking just to leave my neighborhood. And most neighborhoods remotely outside the cities do not have sidewalks. So it’s a chicken-and-egg…
But, is it possible that cities were small because the wrong building style was used? After all, the Spanish colonies to the south of the US are warmer than the South, but had large cities.