Perpetual Peace · Immanuel Kant
TRANSLATOR’S INTRODUCTION
This is an age of unions. Not merely in the economic sphere, in the working world of unworthy ends and few ideals do we find great practical organizations; but law, medicine, science, art, trade, commerce, politics and political economy—we might add philanthropy—standing institutions, mighty forces in our social and intellectual life, all have helped to swell the number of our nineteenth century Conferences and Congresses. It is an age of Peace Movements and Peace Societies, of peace-loving monarchs and peace-seeking diplomats. This is not to say that we are preparing for the millennium. Men are working together, there is a newborn solidarity of interest, but rivalries between nation and nation, the bitternesses and hatreds inseparable from competition are not less keen; prejudice and misunderstanding not less frequent; subordinate conflicting interests are not fewer, are perhaps, in view of changing political conditions and an ever-growing international commerce, multiplying with every year. The talisman is, perhaps, self-interest, but, none the less, the spirit of union is there; it is impossible to ignore a clearly marked tendency towards international federation, towards political peace. This slow movement was not born with Peace Societies; its consummation lies perhaps far off in the ages to come. History at best moves slowly. But something of its past progress we shall do well to know. No political idea seems to have so great a future before it as this idea of a federation of the world. It is bound to realise itself some day; let us consider what are the chances that this day come quickly, what that it be long delayed. What obstacles lie in the way, and how may they be removed? What historical grounds have we for hoping that they may ever be removed? What, in a word, is the origin and history of the idea of a perpetual peace between nations, and what would be the advantage, what is the prospect of realising it?
The international relations of states find their expression, we are told, in war and peace. What has been the part played by these great counteracting forces in the history of nations? What has it been in prehistoric times, in the life of man in what is called the “state of nature”? “It is no easy enterprise,” says Rousseau, in more than usually careful language, “to disentangle that which is original from that which is artificial in the actual state of man, and to make ourselves well acquainted with a state which no longer exists, which perhaps never has existed and which probably never will exist in the future.” (Preface to the _Discourse on the Causes of Inequality_, 1753, publ. 1754.) This is a difficulty which Rousseau surmounts only too easily. A knowledge of history, a scientific spirit may fail him: an imagination ever ready to pour forth detail never does. Man lived, says he, “without industry, without speech, without habitation, without war, without connection of any kind, without any need of his fellows or without any desire to harm them ... sufficing to himself.”[2] (_Discourse on the Sciences and Arts_, 1750.) Nothing, we are now certain, is less probable. We cannot paint the life of man at this stage of his development with any definiteness, but the conclusion is forced upon us that our race had no golden age,[3] no peaceful beginning, that this early state was indeed, as Hobbes held, a state of war, of incessant war between individuals, families and, finally, tribes.
_War in Classical Times._ In early times, there were no friendly neighbouring nations: beyond the boundaries of every nation’s territory, lay the land of a deadly foe. This was the way of thinking, even of so highly cultured a people as the Greeks, who believed that a law of nature had made every outsider, every barbarian their inferior and their enemy.[7] Their treaties of peace, at the time of the Persian War, were frankly of the kind denounced by Kant, mere armistices concluded for the purpose of renewing their fighting strength. The ancient world is a world of perpetual war in which defeat meant annihilation. In the East no right was recognised in the enemy; and even in Greece and Rome the fate of the unarmed was death or slavery.[8] The barbaric or non-Grecian states had, according to Plato and Aristotle, no claim upon humanity, no rights in fact of any kind. Among the Romans things were little better. According to Mr. T. J. Lawrence—see his _Principles of International Law_, III., §§ 21, 22—they were worse. For Rome stood alone in the world: she was bound by ties of kinship to no other state. She was, in other words, free from a sense of obligation to other races. War, according to Roman ideas, was made by the gods, apart altogether from the quarrels of rulers or races. To disobey the sacred command, expressed in signs and auguries would have been to hold in disrespect the law and religion of the land. When, in the hour of victory, the Romans refrained from pressing their rights against the conquered—rights recognised by all Roman jurists—it was from no spirit of leniency, but in the pursuit of a prudent and far-sighted policy, aiming at the growth of Roman supremacy and the establishment of a world-embracing empire, shutting out all war as it blotted out natural boundaries, reducing all rights to the one right of imperial citizenship. There was no real _jus belli_, even here in the cradle of international law; the only limits to the fury of war were of a religious character.
Aristotle strongly condemns the Lacedæmonians and Cretans for regarding war and conquest as the sole ends to which all law and education should be directed. Also in non-Greek tribes like the Scythians, Persians, Thracians and Celts he says, only military power is admired by the people and encouraged by the state. “There was formerly too a law in Macedonia that any one who had never slain an enemy should wear the halter about his neck.” Among the Iberians too, a military people, “it is the custom to set around the tomb of a deceased warrior a number of obelisks corresponding to the number of enemies he has killed.... Yet ... it may well appear to be a startling paradox that it should be the function of a Statesman to succeed in devising the means of rule and mastery over neighbouring peoples whether with or against their own will. How can such action be worthy of a statesman or legislator, when it has not even the sanction of law?” (_op. cit._, IV. Ch. 2.) We see that Aristotle disapproves of a glorification of war for its own sake, and regards it as justifiable only in certain circumstances. Methods of warfare adopted and proved in the East would not have been possible in Greece. An act of treachery, for example, such as that of Jael, (_Judges_ IV. 17) which was extolled in songs of praise by the Jews, (_loc. cit._ V. 24) the Greek people would have been inclined to repudiate. The stories of Roman history, the behaviour of Fabricius, for instance, or Regulus and the honourable conduct of prisoners on various occasions released on parole, show that this consciousness of certain principles of honour in warfare was still more highly developed in Rome.
Socrates in the _Republic_ (V. 469, 470) gives expression to a feeling which was gradually gaining ground in Greece, that war between Hellenic tribes was much more serious than war between Greeks and barbarians. In such civil warfare, he considered, the defeated ought not to be reduced to slavery, nor the slain despoiled, nor Hellenic territory devastated. For any difference between Greek and Greek is to “be regarded by them as discord only—a quarrel among friends, which is not to be called war”.... “Our citizens [_i.e._ in the ideal republic] should thus deal with their Hellenic enemies; and with barbarians as the Hellenes now deal with one another.” (V. 471.) The views of Plato and Aristotle on this and other questions were in advance of the custom and practice of their time.
The treatment of a defeated enemy among the Jews rested upon a similar religious foundation. In the East, we find a special cruelty in the conduct of war. The wars of the Jews and Assyrians were wars of extermination. The whole of the _Old Testament_, it has been said, resounds with the clash of arms.[9] “An eye for an eye, a tooth for a tooth!” was the command of Jehovah to his chosen people. Vengeance was bound up in their very idea of the Creator. The Jews, unlike the followers of Mahomet, attempted, and were commanded to attempt no violent conversion[10]; they were then too weak a nation; but they fought, and fought with success against the heathen of neighbouring lands, the Lord of Hosts leading them forth to battle. The God of Israel stood to his chosen people in a unique and peculiarly logical relation. He had made a covenant with them; and, in return for their obedience and allegiance, cared for their interests and advanced their national prosperity. The blood of this elect people could not be suffered to intermix with that of idolaters. Canaan must be cleared of the heathen, on the coming of the children of Israel to their promised land; and mercy to the conquered enemy, even to women, children or animals was held by the Hebrew prophets to be treachery to Jehovah. (_Sam._ XV.; _Josh._ VI. 21.)
This apparent contradiction between the spirit of the new religion and its practical attitude to war has led to some difference of opinion as to the actual teaching of Christ. The _New Testament_ seems, at a superficial glance, to furnish support as readily to the champions of war as to its denouncers. The Messiah is the Prince of Peace (_Is._ IX. 6, 7; _Heb._ VI.), and here lies the way of righteousness (_Rom._ III. 19): but Christ came not to bring peace, but a sword (_Matth._ X. 34). Such statements may be given the meaning which we wish them to bear—the quoting of Scripture is ever an unsatisfactory form of evidence; but there is no direct statement in the _New Testament_ in favour of war, no saying of Christ which, fairly interpreted, could be understood too regard this proof of human imperfection as less condemnable than any other.[12] When men shall be without sin, nation shall rise up against nation no more. But man the individual can attain peace only when he has overcome the world, when, in the struggle with his lower self, he has come forth victorious. This is the spiritual sword which Christ brought into the world—strife, not with the unbeliever, but with the lower self: meekness and the spirit of the Word of God are the weapons with which man must fight for the Faith.
If that, then, is a laudable custom, how much more so, that while others are engaged in battle, these too should engage as the priests and ministers of God, keeping their hands pure, and wrestling in prayers to God on behalf of those who are fighting in a righteous cause, and for the king who reigns righteously, that whatever is opposed to those who act righteously may be destroyed!’ ... And we do take our part in public affairs, when along with righteous prayers we join self-denying exercises and meditations, which teach us to despise pleasures, and not to be led away by them. And none fight better for the king than we do. We do not indeed fight under him, although he require it; but we fight on his behalf, forming a special army—an army of piety—by offering our prayers to God.” The Fathers of the Church, Justin Martyr, Clement of Alexandria, Tertullian, Ambrose and the rest gave the same testimony against war. The pagan rites connected with the taking of the military oath had no doubt some influence in determining the feeling of the pious with regard to this life of bloodshed; but the reasons lay deeper. “Shall it be held lawful,” asked Tertullian, (_De Corona_, p. 347) “to make an occupation of the sword, when the Lord proclaims that he who uses the sword shall perish by the sword? And shall the son of peace take part in the battle when it does not become him even to sue at law? And shall he apply the chain, and the prison, and the torture, and the punishment, who is not the avenger even of his own wrongs?”
For more than a thousand years the Church counted fighting clergy[18] among its most active supporters. This strange anomaly was, it must be said, at first rather suffered in deference to public opinion than encouraged by ecclesiastical canons and councils, but it gave rise to great discontent at the time of the Reformation.[19] The whole question of the lawfulness of military service for Christians was then raised again. “If there be anything in the affairs of mortals,” wrote Erasmus at this time (_Opera_, II., _Prov._, 951 C) “which it becomes us deliberately to attack, which we ought indeed to shun by every possible means, to avert and to abolish, it is certainly war, than which there is nothing more wicked, more mischievous or more widely destructive in its effects, nothing harder to be rid of, or more horrible and, in a word, more unworthy of a man, not to say of a Christian.”[20] The mediæval Church indeed succeeded, by the establishment of such institutions as the Truce of God, in setting some limits to the fury of the soldier: but its endeavours (and it made several to promote peace)[21] were only to a trifling extent successful. Perhaps custom and public opinion in feudal Europe were too strong, perhaps the Church showed a certain apathy in denouncing the evils of a military society: no doubt the theoretical tenets of its doctrine did less to hinder war than its own strongly military tendency, its lust for power and the force of its example did to encourage it.
Aquinas held that war—excluding private war—is justifiable in a just cause. So too did Luther, (cf. his pamphlet: _Ob Kriegsleute auch in seligem Stande sein können?_) Calvin and Zwingli, the last of whom died sword in hand. With regard to the question of a fighting clergy, the passage quoted from Origen (pp. 14, 15, above) has considerable interest, Origen looks upon the active participation of priests in warfare as something which everyone would admit to be impossible. [20] See also the _Querela Pacis_, 630 B., (_Opera_, IV.):—“Whosoever preaches Christ, preaches peace.” Erasmus even goes the length of saying that the most iniquitous peace is better than the most just war (_op. cit._, 636 C). [21] Cf. Robertson, _op. cit._, Note XXI. p. 483 and Sect. I., p. 39. Hence, in spite of Christianity and its early vision of a brotherhood of men, the history of the Middle Ages came nearer to a realization of the idea of perpetual war than was possible in ancient times. The tendency of the growth of Roman supremacy was to diminish the number of wars, along with the number of possible causes of racial friction. It united many nations in one great whole, and gave them, to a certain extent, a common culture and common interests; even, when this seemed prudent, a common right of citizenship. The fewer the number of boundaries, the less the likelihood of war. The establishment of great empires is of necessity a force, and a great and permanent force working on the side of peace. With the fall of Rome this guarantee was removed.
_The Development of the New Science of International Law._ Out of the ruins of the old feudal system arose the modern state as a free independent unity. Private war between individuals or classes of society was now branded as a breach of the peace: it became the exclusive right of kings to appeal to force. War, wrote Gentilis[22] towards the end of sixteenth century, is the just or unjust conflict between states. Peace was now regarded as the normal condition of society. As a result of these great developments in which the name “state” acquired new meaning, jurisprudence freed itself from the trammelling conditions of mediæval Scholasticism. Men began to consider the problem of the rightfulness or wrongfulness of war, to question even the possibility of a war on rightful grounds. Out of theses new ideas—partly too as one of the fruits of the Reformation,[23]—arose the first consciously formulated principles of the science of international law, whose fuller, but not yet complete, development belongs to modern times. [22] It is uncertain in what year the _De Jure Belli_ of Gentilis was published—a work to which Grotius acknowledges considerable indebtedness. Whewell, in the preface to his translation of Grotius, gives the date 1598, but some writers suppose it to have been ten years earlier.
In the Middle Ages the development of these ideas received little encouragement. All laws are silent in the time of war,[25] and this was a period of war, both bloody and constant. There was no time to think of the right or wrong of anything. Moreover, the Church emphasised the lack of rights in unbelievers, and gave her blessing on their annihilation.[26] The whole Christian world was filled with the idea of a spiritual universal monarchy. Not such as that in the minds of Greek and Jew and Roman who had been able to picture international peace only under the form of a great national and exclusive empire. In this great Christian state there were to be no distinctions between nations; its sphere was bounded by the universe. But, here, there was no room or recognition for independent national states with equal and personal rights. This recognition, opposed by the Roman Church, is the real basis of international law. The Reformation was the means by which the personality of the peoples, the unity and independence of the state were first openly admitted. On this foundation, mainly at first in Protestant countries, the new science developed rapidly. Like the civil state and the Christian religion, international law may be called a peace institution. [25] The saying is attributed to Pompey:—“Shall I, when I am preparing for war, think of the laws?”
The necessary distinction between law and ethics was drawn by Puffendorf,[31] a successor of Grotius who gave an outwardly systematic form to the doctrine of the great jurist, without adding to it either strength or completeness. His views, when they were not based upon the system of Grotius, were strongly influenced by the speculation of Hobbes, his chronological predecessor, to whom we shall have later occasion to refer. In the works of Vattel,[32] who was, next to Rousseau, the most celebrated of Swiss publicists, we find the theory of the customs and practice in war widely developed, and the necessity for humanising its methods and limiting its destructive effects upon neutral countries strongly emphasised. Grotius and Puffendorf, while they recommend acts of mercy, hold that there is legally no right which requires that a conquered enemy shall be spared. This is a matter of humanity alone. It is to the praise of Vattel that he did much to popularise among the highest and most powerful classes of society, ideas of humanity in warfare, and of the rights and obligations of nations. He is, moreover, the first to make a clear separation between this science and the Law of Nature. What, he asks, is international law as distinguished from the Law of Nature? What are the powers of a state and the duties of nations to one another? What are the causes of quarrel among nations, and what the means by which they can be settled without any sacrifice of dignity?
But side by side with this development and gradual popularisation of the new science of International Law, ideas of a less practical, but not less fruitful kind had been steadily making their way and obtaining a strong hold upon the popular mind. The Decree of Eternal Pacification of 1495 had abolished private war, one of the heavy curses of the Middle Ages. Why should it not be extended to banish warfare between states as well? Gradually one proposal after another was made to attain this end, or, at least, to smooth the way for its future realisation. The first of these in point of time is to be found in a somewhat bare, vague form in Sully’s _Memoirs_,[33] said to have been published in 1634. Half a century later the Quaker William Penn suggested an international tribunal of arbitration in the interests of peace.[34] But it was by the French Abbé St. Pierre that the problem of perpetual peace was fairly introduced into political literature: and this, in an age of cabinet and dynastic wars, while the dreary cost of the war of the Spanish succession was yet unpaid. St. Pierre was the first who really clearly realised and endeavoured to prove that the establishment of a permanent state of peace is not only in the interest of the weaker, but is required by the European society of nations and by the reason of man. From the beginning of the history of humanity, poets and prophets had cherished the “sweet dream” of a peaceful civilisation: it is in the form of a practical project that this idea is new.
Parallel to this ideal among the Greeks, we find the hope in Israel of a Messiah whose coming was to bring peace, not only to the Jewish race, but to all the nations of the earth. This idea stands out in the sharpest contrast to the early nationalism of the Hebrew people, who regarded every stranger as an idolater and an enemy. The prophecies of Judaism, combined with the cosmopolitan ideas of Greece, were the source of the idea, which is expressed in the teaching of Christ, of a spiritual world-empire, an empire held together solely by the tie of a common religion. This hope of peace did not actually die during the first thousand years of our era, nor even under the morally stagnating influences of the Middle Ages. When feudalism and private war were abolished in Europe, it wakened to a new life. Not merely in the mouths of poets and religious enthusiasts was the cry raised against war, but by scholars like Thomas More and Erasmus, jurists like Gentilis and Grotius, men high in the state and in the eyes of Europe like Henry IV. of France and the Duc de Sully or the Abbé de St. Pierre whose _Projet de Paix Perpétuelle_ (1713)[35] obtained immediate popularity and wide-spread fame. The first half of the eighteenth century was already prepared to receive and mature a plan of this kind.
The so-called _Grand Dessein_ of Henry IV. was, shortly, as follows.[36] It proposed to divide Europe between fifteen Powers,[37] in such a manner that the balance of power should be established and preserved. These were to form a Christian republic on the basis of the freedom and equality of its members, the armed forces of the federation being supported by fixed contribution. A general council, consisting of representatives from the fifteen states, was to make all laws necessary for cementing the union thus formed and for maintaining the order once established. It would also be the business of this senate to “deliberate on questions that might arise, to occupy themselves with discussing different interests, to settle quarrels amicably, to throw light upon and arrange all the civil, political and religious affairs of Europe, whether internal or foreign.” (_Mémoires_, vol. VI., p. 129 _seq._) [36] The main articles of this and other peace projects are to be found in _International Tribunals_, published by the Peace Society. [37] Professor Lorimer points out that Prussia, then the Duchy of Brandenburg, is not mentioned. (_Institutes of the Law of Nations_, II. Ch. VII., p. 219.)
This scheme of the king or his minister was expanded with great thoroughness and clear-sightedness by the Abbé St. Pierre: none of the many later plans for a perpetual peace has been so perfect in details. He proposes that there should be a permanent and perpetual union between, if possible, all Christian sovereigns—of whom he suggests nineteen, excluding the Czar—“to preserve unbroken peace in Europe,” and that a permanent Congress or senate should be formed by deputies of the federated states. The union should protect weak sovereigns, minors during a regency, and so on, and should banish civil as well as international war—it should “render prompt and adequate assistance to rulers and chief magistrates against seditious persons and rebels.” All warfare henceforth is to be waged between the troops of the federation—each nation contributing an equal number—and the enemies of European security, whether outsiders or rebellious members of the union. Otherwise, where it is possible, all disputes occurring within the union are to be settled by the arbitration of the senate, and the combined military force of the federation is to be applied to drive the Turks out of Europe. There is to be a rational rearrangement of boundaries, but after this no change is to be permitted in the map of Europe. The union should bind itself to tolerate the different forms of faith.
Text from Project Gutenberg, public domain in the United States.