Essentially , the power that has the mightiest navy and prevails on the high seas becomes the world 's greatest power , which is something nations have known for a long time , .
Something nations ' commercial and naval rivalry on the high seas .
Essentially , the power that has the mightiest navy and prevails on the high seas becomes the world 's greatest power , which is something nations have known for a long time , hence their commercial and naval rivalry on the high seas .