Old and handicapped people have lived before cars, and in less car-centric cities forever. Walkable cities mainly mean that things are close to you so you _can_

Old and handicapped people have lived before cars, and in less car-centric cities forever. Walkable cities mainly mean that things are close to you so you _can_ walk to them. Actual car-free areas, like the access-controlled dense old towns in Europe, are possible (if built-out where they don't exist), but not necessarily to be walkable.