subsociety

noun

1. A society making up part of a larger society.

   “In some circumstances, children of mixed parentage form their own subsociety, as is true in India and adjacent countries where there are fairly large groups of Euro-Asians.”

   “In fact, culture is nothing but the willful acquisition of vulnerability. This is exactly the reason it is derided by the Green Berets and their like in other totalitarian societies or subsocieties.”