Public revulsion over the inhumane and ruthless use of submarines by our adversaries during the World War demanded that they be banished forever from the seas. With the passing of the years this demand has grown less and less insistent, but it is still heard; frequently in civilian circles, and even in the public press, the mere mention of submarines causes eyebrows to be raised in horror.
Why, then, do submarines continue to be built? Why have not these international outlaws been sent to a watery grave off soundings, and why have we not entered into a solemn pact never to lay another duct keel? The answer appears to be simple. Underneath the fervent protestations of humanism and altruism on the part of international diplomats there remains the basic knowledge that, after all, the submarine is a most effective instrument of warfare and, as such, not only has great value but can never be completely abolished.