As a complex and specialized society expands, extending out its professional branches in every direction, something unexpected happens: the Other which the society is attempting to surmount and subsume begins to expand within the center of that society's own bosom.
Members of the police and the military for example will drum up all sorts of dark forebodings about outside (or inside) invaders and aliens which are altering the shape of society, the dangers of which the unknown citizen has not a clue about, which simultaneously reveals these members of society are experiencing something entirely different and alien to the experience of the average citizen, that blissfully ignorant sheep that sits munching grass in the pasture.
It couldn't be any other way. The soldier, the officer, the farmer, the construction worker, what have you, now has a radically different life experience from the insurance agent, the administrator, the programmer, etc, by virtue of an intense concentration of life activity that is exclusive to the experience of that professional.
What was once a mixed life experience that could be shared among generalists is now a concentrated and constricted experience relegated to the professional, who sees and understands a slice of society that no one else does, and so the rest of those professionals slide off into the periphery, suspicious in their ignorance of the facts of life that "matter" to the observing professional.
