Conclusion
Custom, state practice, and codification provided important reference points for the legal framework governing international relations in the nineteenth and early twentieth centuries. The Conclusion explores the shifts from custom to codification in international maritime law. It also outlines how Great Britain used international maritime law as an instrument in foreign policy to protect its economic and strategic interests as a sea power. This last chapter then discusses how international maritime law in turn affected visions of future warfare. Great Britain’s neutrality policy, and in particular the Foreign Enlistment Act, shaped the country’s state practice in the second half of the nineteenth century, and the conclusion discusses the importance of state practice in foreign policy at the time.