 In "Mare clausum" (1635) John Selden coined the term, endeavoring to prove that the sea was in practice virtually as capable of appropriation as terrestrial territory.As conflicting claims grew out of the controversy, maritime states came to moderate their demands and base their maritime claims on the principle that it extended seawards from land.A workable formula was found by Cornelius Bynkershoek in his "De dominio maris" (1702), restricting maritime dominion to the actual distance within which cannon range could effectively protect it.