On the slopes of the seven hills that surround the city of Medellín in Colombia, life is pretty good.
Children play in the streets. Retirees relax in the parks. Workers bustle to and fro as street vendors hawk arepas — maize pancakes topped with cheese, avocado, and more.
When I visited the “City of Eternal Spring” in 2014, named for its year-round balmy temperatures, I found its steep residential neighborhoods filled with spaces for art and theater, verdant parks, schools, and public libraries.