There are many to blame for the demise of malls, but there’s one important factor that’s easy to fforget: There are just too dang many of them. The U.S. has more retail square footage per person than other industrialized countries, and we keep adding newer and bigger malls without humanely putting enough of the old ones out of their misery. At the same time, online retailers like Amazon are scrambling to find or build warehouse space to keep up with customer demand.

This is a problem for the retail industry, because they need warehouse space to keep up…