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“Extends his classic Strategy of Conflict to provide timely, timeless guidance for statecraft.”—Graham Allison, author of Nuclear Terrorism: the Ultimate Preventable Catastrophe
“Extends his classic Strategy of Conflict to provide timely, timeless guidance for statecraft.”—Graham Allison, author of Nuclear Terrorism: the Ultimate Preventable Catastrophe
“Tom Schelling is the most significant nuclear strategist of the past half-century. Arms and Influence was essential reading for any serious student of the subject throughout the Cold War. With his new preface and foreword, Schelling demonstrates that in a world facing the threat of nuclear terrorism and belligerent states such as North Korea and Iran, his ideas and examples are vital if we are to continue 'the tradition of non-use' of these ultimate weapons of devastation.”—Michael Nacht, University of California, Berkeley
"Tom Schelling helped shape the way we think about contemporary strategy and nuclear weapons. This important book demonstrates his originality, range, and rigor."—Lawrence Freedman, King's College London
The usual distinction between diplomacy and force is not merely in the instruments, words or bullets, but in the relation between adversaries-in the interplay of motives and the role of communication, understandings, compromise, and restraint. Diplomacy is bargaining; it seeks outcomes that, though not ideal for either party, are better for both than some of the alternatives. In diplomacy each party somewhat controls what the other wants, and can get more by compromise, exchange, or collaboration than by taking things in his own hands and ignoring the other's wishes. The bargaining can be polite or rude, entail threats as well as offers, assume a status quo or ignore all rights and privileges, and assume mistrust rather than trust. But whether polite or impolite, constructive or aggressive, respectful or vicious, whether it occurs among friends or antagonists and whether or not there is a basis for trust and goodwill, there must be some common interest, if only in the avoidance of mutual damage, and an awareness of the need to make the other party prefer an outcome acceptable to oneself.
With enough militaryforce a country may not need to bargain. Some things a country wants it can take, and some things it has it can keep, by sheer strength, skill and ingenuity. It can do this forcibly, accommodating only to opposing strength, skill, and ingenuity and without trying to appeal to an enemy's wishes. Forcibly a country can repel and expel, penetrate and occupy, seize, exterminate, disarm and disable, confine, deny access, and directly frustrate intrusion or attack. It can, that is, if it has enough strength. "Enough" depends on how much an opponent has.
There is something else, though, that force can do. It is less military, less heroic, less impersonal, and less unilateral; it is uglier, and has received less attention in Western military strategy. In addition to seizing and holding, disarming and confining, penetrating and obstructing, and all that, military force can be used to hurt. In addition to taking and protecting things of value it can destroy value. In addition to weakening an enemy militarily it can cause an enemy plain suffering.
Pain and shock, loss and grief, privation and horror are always in some degree, sometimes in terrible degree, among the results of warfare; but in traditional military science they are incidental, they are not the object. If violence can be done incidentally, though, it can also be done purposely. The power to hurt can be counted among the most impressive attributes of military force.
Hurting, unlike forcible seizure or self-defense, is not unconcerned with the interest of others. It is measured in the suffering it can cause and the victims' motivation to avoid it. Forcible action will work against weeds or floods as well as against armies, but suffering requires a victim that can feel pain or has something to lose. To inflict suffering gains nothing and saves nothing directly; it can only make people behave to avoid it. The only purpose, unless sport or revenge, must be to influence somebody's behavior, to coerce his decision or choice. To be coercive, violence has to be anticipated. And it has to be avoidable by accommodation. The power to hurt is bargaining power. To exploit it is diplomacy-vicious diplomacy, but diplomacy.
The Contrast of Brute Force with Coercion
There is a difference between taking what you want and making someone give it to you, between fending off assault and making someone afraid to assault you, between holding what people are trying to take and making them afraid to take it, between losing what someone can forcibly take and giving it up to avoid risk or damage. It is the difference between defense and deterrence, between brute force and intimidation, between conquest and blackmail, between action and threats. It is the difference between the unilateral, "undiplomatic" recourse to strength, and coercive diplomacy based on the power to hurt.
The contrasts are several. The purely "military" or "undiplomatic" recourse to forcible action is concerned with enemy strength, not enemy interests; the coercive use of the power to hurt, though, is the very exploitation of enemy wants and fears. And brute strength is usually measured relative to enemy strength, the one directly opposing the other, while the power to hurt is typically not reduced by the enemy's power to hurt in return. Opposing strengths may cancel each other, pain and grief do not. The willingness to hurt, the credibility of a threat, and the ability to exploit the power to hurt will indeed depend on how much the adversary can hurt in return; but there is little or nothing about an adversary's pain or grief that directly reduces one's own. Two sides cannot both overcome each other with superior strength; they may both be able to hurt each other. With strength they can dispute objects of value; with sheer violence they can destroy them.
And brute force succeeds when it is used, whereas the power to hurt is most successful when held in reserve. It is the threat of damage, or of more damage to come, that can make someone yield or comply. It is latent violence that can influence someone's choice-violence that can still be withheld or inflicted, or that a victim believes can be withheld or inflicted. The threat of pain tries to structure someone's motives, while brute force tries to overcome his strength. Unhappily, the power to hurt is often communicated by some performance of it. Whether it is sheer terroristic violence to induce an irrational response, or cool premeditated violence to persuade somebody that you mean it and may do it again, it is not the pain and damage itself but its influence on somebody's behavior that matters. It is the expectation of more violence that gets the wanted behavior, if the power to hurt can get it at all.
To exploit a capacity for hurting and inflicting damage one needs to know what an adversary treasures and what scares him and one needs the adversary to understand what behavior of his will cause the violence to be inflicted and what will cause it to be withheld. The victim has to know what is wanted, and he may have to be assured of what is not wanted. The pain and suffering have to appear contingent on his behavior; it is not alone the threat that is effective-the threat of pain or loss if he fails to comply-but the corresponding assurance, possibly an implicit one, that he can avoid the pain or loss if he does comply. The prospect of certain death may stun him, but it gives him no choice.
Coercion by threat of damage also requires that our interests and our opponent's not be absolutely opposed. If his pain were our greatest delight and our satisfaction his greatest woe, we would just proceed to hurt and to frustrate each other. It is when his pain gives us little or no satisfaction compared with what he can do for us, and the action or inaction that satisfies us costs him less than the pain we can cause, that there is room for coercion. Coercion requires fording a bargain, arranging for him to be better off doing what we want-worse off not doing what we want-when he takes the threatened penalty into account.
It is this capacity for pure damage, pure violence, that is usually associated with the most vicious labor disputes, with racial disorders, with civil uprisings and their suppression, with racketeering. It is also the power to hurt rather than brute force that we use in dealing with criminals; we hurt them afterward, or threaten to, for their misdeeds rather than protect ourselves with cordons of electric wires, masonry walls, and armed guards. Jail, of course, can be either forcible restraint or threatened privation; if the object is to keep criminals out of mischief by confinement, success is measured by how many of them are gotten behind bars, but if the object is to threaten privation, success will be measured by how few have to be put behind bars and success then depends on the subject's understanding of the consequences. Pure damage is what a car threatens when it tries to hog the road or to keep its rightful share, or to go first through an intersection. A tank or a bulldozer can force its way regardless of others' wishes; the rest of us have to threaten damage, usually mutual damage, hoping the other driver values his car or his limbs enough to give way, hoping he sees us, and hoping he is in control of his own car. The threat of pure damage will not work against an unmanned vehicle.
This difference between coercion and brute force is as often in the intent as in the instrument. To hunt down Comanches and to exterminate them was brute force; to raid their villages to make them behave was coercive diplomacy, based on the power to hurt. The pain and loss to the Indians might have looked much the same one way as the other; the difference was one of purpose and effect. If Indians were killed because they were in the way, or somebody wanted their land, or the authorities despaired of making them behave and could not confine them and decided to exterminate them, that was pure unilateral force. If some Indians were killed to make other Indians behave, that was coercive violence-or intended to be, whether or not it was effective. The Germans at Verdun perceived themselves to be chewing up hundreds of thousands of French soldiers in a gruesome "meatgrinder." If the purpose was to eliminate a military obstacle-the French infantryman, viewed as a military "asset" rather than as a warm human being-the offensive at Verdun was a unilateral exercise of military force. If instead the object was to make the loss of young men-not of impersonal "effectives," but of sons, husbands, fathers, and the pride of French manhood-so anguishing as to be unendurable, to make surrender a welcome relief and to spoil the foretaste of an Allied victory, then it was an exercise in coercion, in applied violence, intended to offer relief upon accommodation. And of course, since any use of force tends to be brutal, thoughtless, vengeful, or plain obstinate, the motives themselves can be mixed and confused. The fact that heroism and brutality can be either coercive diplomacy or a contest in pure strength does not promise that the distinction will be made, and the strategies enlightened by the distinction, every time some vicious enterprise gets launched.
The contrast between brute force and coercion is illustrated by two alternative strategies attributed to Genghis Khan. Early in his career he pursued the war creed of the Mongols: the vanquished can never be the friends of the victors, their death is necessary for the victor's safety. This was the unilateral extermination of a menace or a liability. The turning point of his career, according to Lynn Montross, came later when he discovered how to use his power to hurt for diplomatic ends. "The great Khan, who was not inhibited by the usual mercies, conceived the plan of forcing captives-women, children, aged fathers, favorite sons-to march ahead of his army as the first potential victims of resistance." Live captives have often proved more valuable than enemy dead; and the technique discovered by the Khan in his maturity remains contemporary. North Koreans and Chinese were reported to have quartered prisoners of war near strategic targets to inhibit bombing attacks by United Nations aircraft. Hostages represent the power to hurt in its purest form.
Coercive Violence in Warfare
This distinction between the power to hurt and the power to seize or hold forcibly is important in modern war, both big war and little war, hypothetical war and real war. For many years the Greeks and the Turks on Cyprus could hurt each other indefinitely but neither could quite take or hold forcibly what they wanted or protect themselves from violence by physical means. The Jews in Palestine could not expel the British in the late 1940s but they could cause pain and fear and frustration through terrorism, and eventually influence somebody's decision. The brutal war in Algeria was more a contest in pure violence than in military strength; the question was who would first find the pain and degradation unendurable. The French troops preferred-indeed they continually tried-to make it a contest of strength, to pit military force against the nationalists' capacity for terror, to exterminate or disable the nationalists and to screen off the nationalists from the victims of their violence. But because in civil war terrorists commonly have access to victims by sheer physical propinquity, the victims and their properties could not be forcibly defended and in the end the French troops themselves resorted, unsuccessfully, to a war of pain.
Nobody believes that the Russians can take Hawaii from us, or New York, or Chicago, but nobody doubts that they might destroy people and buildings in Hawaii, Chicago, or New York. Whether the Russians can conquer West Germany in any meaningful sense is questionable; whether they can hurt it terribly is not doubted. That the United States can destroy a large part of Russia is universally taken for granted; that the United States can keep from being badly hurt, even devastated, in return, or can keep Western Europe from being devastated while itself destroying Russia, is at best arguable; and it is virtually out of the question that we could conquer Russia territorially and use its economic assets unless it were by threatening disaster and inducing compliance. It is the power to hurt, not military strength in the traditional sense, that inheres in our most impressive military capabilities at the present time. We have a Department of Defense but emphasize retaliatior-"to return evil for evil" (synonyms: requital, reprisal, revenge, vengeance, retribution). And it is pain and violence, not force in the traditional sense, that inheres also in some of the least impressive military capabilities of the present time-the plastic bomb, the terrorist's bullet, the burnt crops, and the tortured farmer.
War appears to be, or threatens to be, not so much a contest of strength as one of endurance, nerve, obstinacy, and pain. It appears to be, and threatens to be, not so much a contest of military strength as a bargaining process-dirty, extortionate, and often quite reluctant bargaining on one side or both-nevertheless a bargaining process.
The difference cannot quite be expressed as one between the use of force and the threat of force. The actions involved in forcible accomplishment, on the one hand, and in fulfilling a threat, on the other, can be quite different. Sometimes the most effective direct action inflicts enough cost or pain on the enemy to serve as a threat, sometimes not. The United States threatens the Soviet Union with virtual destruction of its society in the event of a surprise attack on the United States; a hundred million deaths are awesome as pure damage, but they are useless in stopping the Soviet attack-especially if the threat is to do it all afterward anyway. So it is worthwhile to keep the concepts distinct-to distinguish forcible action from the threat of pain -recognizing that some actions serve as both a means of forcible accomplishment and a means of inflicting pure damage, some do not. Hostages tend to entail almost pure pain and damage, as do all forms of reprisal after the fact. Some modes of self-defense may exact so little in blood or treasure as to entail negligible violence; and some forcible actions entail so much violence that their threat can be effective by itself.
The power to hurt, though it can usually accomplish nothing directly, is potentially more versatile than a straightforward capacity for forcible accomplishment. By force alone we cannot even lead a horse to water-we have to drag him-much less make him drink. Any affirmative action, any collaboration, almost anything but physical exclusion, expulsion, or extermination, requires that an opponent or a victim do something, even if only to stop or get out. The threat of pain and damage may make him want to do it, and anything he can do is potentially susceptible to inducement. Brute force can only accomplish what requires no collaboration. The principle is illustrated by a technique of unarmed combat: one can disable a man by various stunning, fracturing, or killing blows, but to take him to jail one has to exploit the man's own efforts. "Come-along" holds are those that threaten pain or disablement, giving relief as long as the victim complies, giving him the option of using his own legs to get to jail.
Excerpted from ARMS AND INFLUENCE by THOMAS C. SCHELLING Copyright © 2008 by Yale University. Excerpted by permission.
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1 The Diplomacy of Violence 1
2 The Art of Commitment 35
3 The Manipulation of Risk 92
4 The Idiom of Military Action 126
5 The Diplomacy of Ultimate Survival 190
6 The Dynamics of Mutual Alarm 221
7 The Dialogue of Competitive Armament 260
Afterword: An Astonishing Sixty Years: The Legacy of Hiroshima 287