Basic strategy must be determined by a perpetual remembrance that the world is round. Like most other important observations this may be considered obvious, but its realization in the abstract and its application in the concrete are two different things.
Wriston, Henry M.
"Basic Factors Influencing Our Strategy,"
Naval War College Review: Vol. 5
, Article 5.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol5/iss7/5