" Such streets need controls to defend them from the ruin that completely permissive diversity might indeed bring them. But the controls needed are not controls on kinds of uses. The controls needed are controls on the scale of street frontage permitted to a use. This is so obvious and so ubiquitous a city problem that one would think its solution must be among the concerns of zoning theory. Yet the very existence of the problem is not even recognized in zoning theory. "

― Jane Jacobs , The Death and Life of Great American Cities