The history of humanity has been closely associated with the sea. Even disregarding the theory that attributes the birth of organic life to that salty environment, one can not deny that through the blue and green expanses of water, different streams of civilizations marked the road of history along the centuries. But man's primary interest in the ocean has been as a means of transportation or communication.
Alvarez, Jose A.
"Strategic Implications of Continental Shelves,"
Naval War College Review: Vol. 22
, Article 8.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol22/iss9/8