It is needless, perhaps, to point out that the work of Grotius is not and could not be a work of permanent authority as a digest of international law. His own wise appreciation of the positive and historical element--the authority derived from custom--should exempt him from the pretense of absolute finality. It is the Book of Genesis only that he has given us, but it is his indefeasible distinction to have recorded the creation of order out of chaos in the great sphere of international relationship, justly entitling him to the honor accorded to him by the spontaneous consent of future times as the Father of International Jurisprudence. It is not difficult after more than three centuries of thought and experience to point out the defects in his doctrine. If he justifies slavery, it is not without ingenuity; for, he argues, if a man may sell his labor, why not his liberty? and if the conqueror may impose his will upon the property of the vanquished, why not also upon his person? If he identifies sovereignty with supreme power without any adequate conception of its ethical basis, he is at least as advanced in his thinking as the conceptions of his time, which had not yet grasped the idea of the state as a moral organism. If he has no adequate notion of neutrality, believing it to be the duty of a nation to enlist its energies for what it deems the right side, rather than to disavow all responsibility for actions foreign to its own interests, he is at least supported in this by the opinion of the multitude even at the present time; and even among jurists the modern conception of neutrality is hardly a century old. If the new schools of jurisprudence make light of Natural Law as a foundation of public and private rights, it is not certain that Grotius may not yet be vindicated as representing a doctrine at least as clear as any other which has been substituted for it. But, finally, to all these criticisms it may be answered, that no great thinker can be justly estimated except in relation to his predecessors and contemporaries. Measured by these, Grotius stands alone among the jurists of his century for originality of thought and power of exposition. V. THE INFLUENCE OF GROTIUS'S WORK.