Interest idea.....but let’s see, India with slightly over a billion souls, and China with well over a billion souls.....hmmmm...ya think 55% of the world’s population might live in an area encompassing those counties...?
India and China are in a sense pretty far away, because they have a few little hills in between called The Himalayas.
They won’t stop missiles flying over, but they are a major impediment to moving armies in order to conquer territory.