Here's another, not very practical or scalable solution: live in a small, healthy European village in the 200 to 1000 population range. I have a grocery store,

Here's another, not very practical or scalable solution: live in a small, healthy European village in the 200 to 1000 population range. I have a grocery store, a hair stylist, a kindergarten and my firewood guy within walking distance. And 499 neighbors, some of whom have become friends. What I'm saying is that it goes the other direction sometimes: physical proximity can create friendship when you make a commitment to a place and make a concerted effort to take care of your neighbors.