Walls.  We’ve been hearing a lot about them lately.  Concrete walls and steel walls and bollard fences. But walls are not just physical barriers that stand between people or communities or nation-states. There are other kinds, as well.

Some walls are not built with metal or wood or whatever else technology or ingenuity can manufacture.  They are, rather, erected within our minds and our hearts, born from blind prejudices and long-festering hatreds that too often span centuries and generations.  These walls, these soul-killing monuments harbored by far too many for far too long, aren’t visible to the eye.  But they are experienced every day, in all corners of the world.

Rod Serling knew this well, and some of the more memorable episodes of The Twilight Zone dealt with such issues.  One in particular, which sometimes flies under the proverbial radar, was a third-season tour de force called “The Shelter.” (Airdate…