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Albert Einstein and Sigmund Freud, "Why War?" (1932)

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So far I have set out what seems to me the kernel of the matter: the suppression of brute force by the transfer of power to a larger combination, founded on the community of sentiments linking up its members. All the rest is mere tautology and glosses. Now the position is simple enough so long as the community consists of a number of equally strong individuals. The laws of such a group can determine to what extent the individual must forfeit personal freedom, the right of using personal force as an instrument of violence, to ensure the safety of the group. But such a combination is only theoretically possible; in practice the situation is always complicated by the fact that, from the outset, the group includes elements of unequal power, men and women, elders and children, and, very soon, as a result of war and conquest, victors and the vanquished—i.e. masters and slaves—as well. From this time on the common law takes notice of these inequalities of power, laws are made by and for the rulers, giving the servile classes fewer rights. Thenceforward there exist within the state two factors making for legal instability, but legislative evolution, too: first, the attempts by members of the ruling class to set themselves above the law’s restrictions and, secondly, the constant struggle of the ruled to extend their rights and see each gain embodied in the code, replacing legal disabilities by equal laws for all. The second of these tendencies will be particularly marked when there takes place a positive mutation of the balance of power within the community, the frequent outcome of certain historical conditions. In such cases the laws may gradually be adjusted to the changed conditions or (as more usually ensues) the ruling class is loath to reckon with the new developments, the result being insurrections and civil wars, a period when law is in abeyance and force once more the arbiter, followed by a new regime of law. There is another factor of constitutional change, which operates in a wholly pacific manner, viz: the cultural evolution of the mass of the community; this factor, however, is of a different order and can only be dealt with later.

Thus we see that, even within the group itself, the exercise of violence cannot be avoided when conflicting interests are at stake. But the common needs and habits of men who live in fellowship under the same “sky” favor a speedy issue of such conflicts and, this being so, the possibilities of peaceful solutions make steady progress. Yet the most casual glance at world history will show an unending series of conflicts between one community and another or a group of others, between larger and smaller units, between cities, countries, races, tribes and kingdoms, almost all of which were settled by the ordeal of war. Such wars end either in pillage or in conquest and its fruits, the downfall of the loser. No single all-embracing judgment can be passed on these wars of aggrandizement. Some, like the war between the Mongols and the Turks, have led to unmitigated misery; others, however, have furthered the transition from violence to law, since they brought larger units into being, within whose limits a recourse to violence was banned and a new regime determined all disputes. Thus the Roman conquests brought that boon, the pax romana, to the Mediterranean lands. The French kings’ lust for aggrandizement created a new France, flourishing in peace and unity. Paradoxical as it sounds, we must admit that warfare well might serve to pave the way to that unbroken peace we so desire, for it is war that brings vast empires into being, within whose frontiers all warfare is proscribed by a strong central power. In practice, however, this end is not attained, for as a rule the fruits of victory are but short-lived, the new-created unit falls asunder once again, generally because there can be no true cohesion between the parts that violence has welded. Hitherto, moreover, such conquests have only led to aggregations which, for all their magnitude, had limits, and disputes between these units could be resolved only by recourse to arms. For humanity at large the sole result of all these military enterprises was that, instead of frequent not to say incessant little wars, they had now to face great wars which, for all they came less often, were so much the more destructive.

Regarding the world of today the same conclusion holds good, and you, too, have reached it, though by a shorter path. There is but one sure way of ending war and that is the establishment, by common consent, of a central control which shall have the last word in every conflict of interests. For this, two things are needed: first, the creation of such a supreme court of judicature; secondly, its investment with adequate executive force. Unless this second requirement be fulfilled, the first is unavailing. Obviously the League of Nations, acting as a Supreme Court, fulfils the first condition; it does not fulfil the second. It has no force at its disposal and can only get it if the members of the new body, its constituent nations, furnish it. And, as things are, this is a forlorn hope. Still we should be taking a very short-sighted view of the League of Nations were we to ignore the fact that here is an experiment the like of which has rarely—never before, perhaps, on such a scale—been attempted in the course of history. It is an attempt to acquire the authority (in other words, coercive influence), which hitherto reposed exclusively on the possession of power, by calling into play certain idealistic attitudes of mind. We have seen that there are two factors of cohesion in a community: violent compulsion and ties of sentiment (“identifications,” in technical parlance) between the members of the group. If one of these factors becomes inoperative, the other may still suffice to hold the group together. Obviously such notions as these can only be significant when they are the expression of a deeply rooted sense of unity, shared by all. It is necessary, therefore, to gauge the efficacy of such sentiments. History tells us that, on occasion, they have been effective. For example, the Panhellenic conception, the Greeks’ awareness of superiority over their barbarian neighbors, which found expression in the Amphictyonies, the Oracles and Games, was strong enough to humanize the methods of warfare as between Greeks, though inevitably it failed to prevent conflicts between different elements of the Hellenic race or even to deter a city or group of cities from joining forces with their racial foe, the Persians, for the defeat of a rival. The solidarity of Christendom in the Renaissance age was no more effective, despite its vast authority, in hindering Christian nations, large and small alike, from calling in the Sultan to their aid. And, in our times, we look in vain for some such unifying notion whose authority would be unquestioned. It is all too clear that the nationalistic ideas, paramount today in every country, operate in quite a contrary direction. There are some who hold that the Bolshevik conceptions may make an end of war, but, as things are, that goal lies very far away and, perhaps, could only be attained after a spell of brutal internecine warfare. Thus it would seem that any effort to replace brute force by the might of an ideal is, under present conditions, doomed to fail. Our logic is at fault if we ignore the fact that right is founded on brute force and even today needs violence to maintain it.

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