dominancy in world politics is the virtual impossibility of other rival nations to invade it.
With two large Oceans on either side, a very friendly and quite similar culturally nation to the North, and very militarily and economically week nations to the South, the USA needs to invest very little (comparatively) in border defenses. Had there been land-bridges between China, Russia, Japan or Germany and the USA.
Answers & Comments
One important factor of the USA
dominancy in world politics is the virtual impossibility of other rival nations to invade it.
With two large Oceans on either side, a very friendly and quite similar culturally nation to the North, and very militarily and economically week nations to the South, the USA needs to invest very little (comparatively) in border defenses. Had there been land-bridges between China, Russia, Japan or Germany and the USA.
From: Quora
To: Brainly