From politics to religion and from sports to one’s personal life, boundaries are everywhere. Humans seem to have this innate desire to segregate, to divide. We feel comfortable only when things are packed away neatly into distinctly classified boxes and when there is no ambiguity in matters.
While most boundaries are of the divisive sort, some actually do humanity good. Railings and fences, for example, while generally ordinary and boring, serve very noble purposes. They prevent people from falling off or out of things. This may seem menial, but such railings and fences have undoubtedly saved hundreds of lives.