Illegal and inhuman acts, however justifiable they may be thought to be, against an enemy who is believed to have acted in contravention of law and humanity, are manifestly indefensible when they deprive neutrals of their acknowledged rights, particularly when they violate the right to life itself. If a belligerent cannot retaliate against an enemy without injuring the lives of neutrals, as well as their property, humanity, as well as justice and a due regard for the dignity of neutral powers, should dictate that the practice be discontinued. If persisted in it would in such circumstances constitute an unpardonable offense against the sovereignty of the neutral nation affected. The Government of the United States is not unmindful of the extraordinary conditions created by this war or of the radical alterations of circumstance and method of attack produced by the use of instrumentalities of naval warfare which the nations of the world cannot have had in view when the existing rules of international law were formulated, and it is ready to make every reasonable allowance for these novel and unexpected aspects of war at sea; but it cannot consent to abate any essential or fundamental right of its people because of a mere alteration of circumstance. The rights of neutrals in time of war are based upon principle, not upon expediency, and the principles are immutable. It is the duty and obligation of belligerents to find a way to adapt the new circumstances to them. The events of the past two months have clearly indicated that it is possible and practicable to conduct such submarine operations as have characterized the activity of the Imperial German Navy within the so-called war zone in substantial accord with the accepted practices of regulated warfare. The whole world has looked with interest and increasing satisfaction at the demonstration of that possibility by German naval commanders. It is manifestly possible, therefore, to lift the whole practice of submarine attack above the criticism which it has aroused and remove the chief causes of offense. In view of the admission of illegality made by the Imperial Government when it pleaded the right of retaliation in defense of its acts, and in view of the manifest possibility of conforming to the established rules of naval warfare, the Government of the United States cannot believe that the Imperial Government will longer refrain from disavowing the wanton act of its naval commander in sinking the Lusitania or from offering reparation for the American lives lost, so far as reparation can be made for a needless destruction of human life by an illegal act.