Insularity /(?)/

In·su·lar·i·ty

Insularity

n.
  1. The state or quality of being an island or consisting of islands; insulation.
    The insularity of Britain was first shown by Agricola, who sent his fleet round it.
    — Pinkerton.
  2. Narrowness or illiberality of opinion; prejudice; exclusiveness; as, the insularity of the Chinese or of the aristocracy.