Arms and Influence

The Henry L. Stimson Lectures Series

by Thomas C. Schelling

Traditionally, Americans have viewed war as an alternative to diplomacy, and military strategy as the science of victory.  Today, however, in our world of nuclear weapons, military power is not so much exercised  as threatened.  It is, Mr. Schelling says, bargaining power, and the exploitation of this power, for good or evil, to preserve peace or to threaten war, is diplomacy—the diplomacy of violence.  The author concentrates in this book on the way in which military capabilities—real or imagined—are used, skillfully or clumsily, as bargaining power.  He sees the steps taken by the U.S. during the Berlin and Cuban crises as not merely preparations for engagement, but as signals to an enemy, with reports from the adversary's own military intelligence as our most important diplomatic communications.  Even the bombing of North Vietnam, Mr. Schelling points out, is as much coercive as tactical, aimed at decisions as much as bridges.  He carries forward the analysis so brilliantly begun in his earlier The Strategy of Conflict (1960) and Strategy and Arms Control (with Morton Halperin, 1961), and makes a significant contribution to the growing literature on modern war and diplomacy. Stimson Lectures.Mr. Schelling is professor of economics at Harvard and acting director of Harvard's Center for International Affairs. "An exemplary text on the interplay of national purpose and military force."— Book Week. "A grim but carefully reasoned and coldly analytical book. . . . One of the most frightening previews which this reviewer has ever seen of the roads that lie just ahead in warfare."— Los Angeles Times. "A brilliant and hardheaded book. It will frighten those who prefer not to dwell on the unthinkable and infuriate those who have taken refuge in the stereotypes and moral attitudinizing."— New York Times Book Review.

Genres: Politics, International Relations, Nonfiction, History, War, Military Fiction, Political Science

318 pages, Paperback

First published September 10, 1967

About the author

Thomas Crombie Schelling was an American economist and professor of foreign affairs, national security, nuclear strategy, and arms control at the School of Public Policy at University of Maryland, College Park. He is also co-faculty at the New England Complex Systems Institute. He was awarded the 2005 Nobel Prize in Economics (shared with Robert Aumann) for "having enhanced our understanding of conflict and cooperation through game-theory analysis."

Excerpted from Wikipedia.

Reviews

[Raj Agrawal · Rating 5 out of 5]

[Disclaimer: This is a snapshot of my thoughts on this book after just reading it. This is not meant to serve as a summary of main/supporting points or a critique – only as some words on how I engaged with this book for the purposes of building a theoretical framework on strategy.]

-- Assigned reading for School of Advanced Air & Space Studies, chapters 1-3 only --

I must admit up front that I became biased in favor of Schelling’s ideas almost immediately. While he makes a distinction between war and coercion, his theories seem very much on track with Sun Tzu – the target is the enemy’s mind. Schelling presents a profound theory on compellence as a subset of coercion, where “the ideal compellent action would be one that, once initiated, causes minimal harm if compliance is forthcoming and great harm if compliance is not forthcoming, is consistent with the time schedule of feasible compliance, is beyond recall once initiated, and cannot be stopped by the party that started it but automatically stops upon compliance, with all this fully understood by the adversary” (89). His theory is proposed during the bipolar international order of the US-USSR at a time when relative balance has been established post Cuban Missile Crisis.

While I won’t highlight all of Schelling’s major points, one of his more impressive observations is the difference between violence and latent violence (3). The manipulation of the enemy’s willingness to accept risk based on what threat he believes still exists is a significant factor in compellence. Schelling offers: “Military victory is often the prelude to violence, not the end of it, and the fact that successful violence is usually held in reserve should not deceive us about the role it plays” (13). Every violence act has a long-term consequence, and the belief in latent (or residual) capabilities matters. Not only the capability, but the will to use it – that is a fundamental aspect of this theory. The will is not so much the action, but the belief in the action, as well as the fear of escalation beyond what is acceptable (nuclear exchange in this case) are all part of the international chess game of compellence.

Technology has made nuclear exchange a possibility, and devastation can be delivered across oceans within 30 minutes. Passive defenses allow leaders the opportunity to be more calculated in determining response options, and vulnerability limits the time in which decisions must be made. Active defenses, or even the belief in them, have the opposite effect in the balance of risk, and can in fact increase the chances of nuclear exchange. Where once military strategy was simply a plan of how to win against other military forces, technology has brought force back into the realm of diplomacy. Every act of violence becomes part of a risk calculation that could potentially lead to general nuclear war.

Credibility becomes important as a means to coerce. Given limited resources, a state can only commit to so many actions and remain credible, and when tested, that state must be able to follow through on its commitments. Once a state does not follow through, it loses credibility in all of its commitments, thereby losing its ability to coerce. Schelling proposes that a little uncertainty adds to a state’s ability to coerce, since it provides some margin in the enemy’s risk calculus. Being absolutely predictable is not a good thing.

While Schelling does not use Sun Tzu’s “death ground” language, he provides the same solution. Paraphrasing Sun Tzu, “death ground” is where the forces have no choice but to fight – they are surrounded, and the only options are death or victory. Sun Tzu believed it was a military’s strongest fighting position, and maneuvering your own weaker force into a death ground situation was the best way to get the most out of that force. Schelling proposed the same idea with relinquishing the initiative: “[the enemy] must decide instead what he ought to do if you were incapable of anything but resisting him” (43). If the enemy believes you have options to not fight, then your offensive, compelling position has less value. The follow-through with compellence is that it “requires that the punishment be administered until the other acts, rather than if he acts” (70). Compellence is initiating the offensive shift of risk, with definite objectives within a definite amount of time.

Finally, brinkmanship involves sharing a risk with others so that if disaster occurs, the shared risk is felt by all. Brinkmanship becomes the game of risk manipulation, compelling the opponent to comply by balancing between offensive and defensive maneuvers. Limited wars becomes more practical in this context, since they serve not only as mechanisms to bolster credibility, but also to use risk to gain ground against the opponent.

Schelling provided me some hope that advancing technology does not guarantee great devastation for humanity down the road. Technology simply becomes part of the risk calculus – a way to affect the mind of the enemy. Certainly, the balance the world “enjoyed” (for lack of a better word) during the Cold War showed signs of weakness by the introduction of the Cuban Missile Crisis. A third party with nuclear weapons makes the complexity of risk calculation almost unmanageable. As a result, arms reduction, arms control, and non-proliferation have become defensive mechanisms to limit the risk of a nuclear exchange. Nevertheless, Schelling provides a template that we have seen in Sun Tzu, Fuller, and even Boyd – ultimately, the target is the mind of the enemy, and every offensive and defensive action (or inaction) affects our ability to manipulate the international political environment in our favor.

[Hadrian · Rating 5 out of 5]

The essence of the crisis is unpredictability.

[Serenity · Rating 3 out of 5]

5/10. Read for class. Informative, interesting, easy to understand, and definitely must-read for those interested in political-science and security studies. However, not a super entertaining book if you're not into the subject matter. Author gets very very repetitive, which is a good thing for students but could get tedious.

[Mark Liu · Rating 3 out of 5]

Originally written during the Cold War, Arms and Influence addresses the issue of how countries use military power to bargain. I love that Schelling is willing to talk about what is, in polite conversation, considered unspeakable. The fact is that governments must do away with niceties when considering issues of national defense (though he considers "defense" a misnomer) in order to understand the benefits and tradeoffs of different communication strategies. Posturing and pre-commitment to action on a national scale affect other countries' perception of the United States, which in turn affects their willingness to engage in conflicts.

Schelling also notes that nuclear weapons greatly change the playing field, though not simply due to their destructive power. Instead, they have the capacity to invert the traditional order, in which a country is first defeated militarily and then suffers heavy losses to their people. In addition, nuclear weapons have only destructive power and no capacity to

Unfortunately, the book is dryly written and not particularly fun to read. Schelling finds an infinitude of ways to repeat himself and I could not will myself to finish this book.

[Sam]

A lot of the points Schelling makes in Arms and Influence were ideas that I’d never considered before but that seem obvious in hindsight. Maybe that’s a very high compliment. Not sure. This book is most broadly about bargaining and negotiating, about how adversaries interact with each other off the battlefield. Their tools include pain, coercion, deterrence, compellence, threats, lies, and nuclear weapons. So it’s about the decisions a powerful country must make, but Schelling’s way of addressing problems has a satisfying clarity that I think is pretty generalizable. He is constantly trying to get at why actors do what they do, even if we've long taken their behavior(s) for granted. He draws on diverse examples to make his points: he invokes Vietnam and Korea and World War II, the Greeks (Xenophon, Thucydides, Herodotus), and Shakespeare’s Henry V, Joseph Conrad’s The Secret Agent, A High Wind in Jamaica. I’ve seen people call the book dry, but I don’t entirely agree, at least not about its first half.

First, the coercive influence of pain. Pain is most effective when it carries a threat of withheld violence (eg, “We will start bombing you tomorrow” or “We will bomb you even harder tomorrow”) and when the opponent knows that the pain is contingent on their behavior (“We will start bombing you tomorrow, unless…”). America’s greatest military capacity (when Schelling was writing and evidently still today) is not traditional military strength but the ability to inflict pain on an enemy country: “The power to hurt is nothing new in warfare, but for the United States modern technology has drastically enhanced the strategic importance of pure, unconstructive, unacquisitive pain and damage … This in turn enhances the importance of war and threats of war as techniques of influence, not of destruction; of coercion and deterrence, not of conquest and defense” (33).

The ability to hurt is a powerful one because it forces the enemy to “want” to meet demands, something force alone can’t do. The threat to hurt is also much more elegant than the inflicting of pain: “Withheld violence—successfully threatened violence—can look clean, even merciful” (10). This logic applies to peace negotiations, invariably carried out with the threat of additional violence unless the defeated side agrees to terms. Of course, for this to work, the enemy must have a clear idea what you want, and your desires and theirs can’t be completely opposed; there must be room for bargaining. The violence remains latent but still influences the outcome; by the time negotiations occur, however, violence may already have been done to the populace, with more threatened as a way of bringing the government to the table.

“To fight abroad is a military act, but to persuade enemies or allies that one would fight abroad, under circumstances of great cost and risk, requires more than a military capability,” writes Schelling. “It requires projecting intentions. It requires having those intentions … and communicating them persuasively to make other countries behave.” (36). Perception matters more than reality. Treaties are not enough, and leaders know that, when forced, Country A may not actually come to Country B’s defense if Country C invades. A country must convince its allies and adversaries, usually through actions rather than words, that a red line exists. Often this is done by burning the boats and daring the enemy to attack you.

An instructive example is the United States’s decision to station several thousand troops in West Berlin. Why was America committed to defending West Berlin? Because its commitments and threats are interconnected: “our commitment to Berlin has become so deep and diffuse that most of us often do not have to think about who our commitment is to” (55). Really the overarching commitment was to the Soviets—to showing them that encroachment would not be permitted anywhere. It can be best to keep a commitment vague rather than specific; this can help a country save face if its deterrent threats fail, and it avoids trapping that country in a commitment that becomes a liability. Now, could a few thousand troops have stopped a Soviet invasion? Obviously not: they were a deterrent because America would have had to respond forcefully to their deaths. Their deaths also would not oblige America to respond in a particular way, like a treaty might have. The deployment of the troops was an ill-defined, open-ended step that left the Soviets with the initiative—and in this case having the initiative is a serious liability.

That the initiative would be a bad thing to have seems counterintuitive, but Schelling is clearly right when he tells us that it’s a danger. “Initiative is good if it means imaginativeness, boldness, new ideas. But the term somewhat disguises the fact that deterrence, particularly deterrence of anything less than mortal assault on the United States, often depends on getting into a position where the initiative is up to the enemy and it is he who has to make the awful decision to proceed to a clash” (44). If each side has serious reason not to want a war, the least comfortable position to be in would be the potential aggressor’s. This is the logic of deterrence; compellence, meanwhile, is the exercise of force to make the enemy do what you want.

These, I think, are Schelling’s most significant arguments, though he makes several other notable points in the book’s second half, particularly about restraint. One is that we seek out natural limits, whether that means not bombing north of the Yalu River during the Korean War or using zero nuclear weapons after World War II rather than using them in a limited capacity: “There is a simplicity, a kind of virginity, about all-or-nothing distinctions that differences of degree do not have” (130).

Another is that a reprisal is usually not just proportionate but the same kind of attack as the one to which it’s a response, which Schelling (I think correctly) attributes to “a willingness to accept limits and bounds. It avoids abruptness and novelty of a kind that might startle and excessively confuse an opponent. It maintains a sense of communication, of diplomatic conduct” (149).

A third is his praise of bargaining: “To think of war as a bargaining process is uncongenial to some of us. Bargaining with violence smacks of extortion, vicious politics, callous diplomacy, and everything indecent, illegal, or uncivilized. It is bad enough to kill and maim, but to do it for gain and not for some transcendent purpose seems even worse. Bargaining also smacks of appeasement, of politics and diplomacy, of accommodation or collaboration with the enemy, of selling out and compromising, of everything weak and irresolute. But to fight a purely destructive war is neither clean nor heroic; it is just purposeless. No one who hates war can eliminate its ugliness by shutting his eyes to the need for responsible direction; coercion is the business of war” (215-6).

A fourth point deals with disarmament, which is almost meaningless unless a country’s capacity to rearm itself is also limited; for stability in a world without, or with fewer, armaments, you would need “rearmament parity” (257).

A final point is that one power has a great ability to influence other powers just by signaling an intention to expand its military capacity: “When the Secretary of Defense makes an announcement about the total number of missiles or submarines or long-range bombers this country plans to have on successive dates in the future, he is providing a guideline for Soviet forces planning at the same time. And presumably Soviet programs, to the extent that we can perceive them with any confidence, have an influence on ours. The Soviet leaders have probably learned that the easiest way to add bargaining power to those in the United States who would like to double our missile force is to enlarge their own, or to seem about to enlarge it, or to find a persuasive way of claiming that it is going to be larger than we had predicted” (271).

The later sections of Arms and Influence have a lot in them about how a country should go about waging a nuclear war, or at least a war in the age of nuclear weapons. This is not a recommendation to wage nuclear war; Schelling is opposed to the detonation of nuclear weapons and considers the taboo on their use one of the great triumphs of the post-war era. Rather, Schelling emphasizes that nuclear war would not be instant global annihilation but something that would have to be managed, and that like conventional war would involve opportunities for escalation and de-escalation. This is why the final chapter emphasizes the importance of listening and communicating. I think Schilling is entirely correct, but much in these sections is dated. They contain too much particular advice about managing the American-Soviet relationship to be entirely useful for understanding modern nuclear realities.

That said, Schelling has a lot that’s interesting to say about nukes. Some of his observations: nuclear weapons are the reason the ability to hurt has become so great, and therefore are a major reason that coercive power now matters more than traditional military strength. Nuclear weapons are different from other weapons because they cause mass death and destruction very quickly. Nuclear weapons reverse the order of war, making it so that rather than having to kill enemy forces before leveling a country, one country can level another without destroying its military capabilities. And, if nuclear war breaks out, it almost definitely will be something we’ve stumbled into, and we should therefore have off-ramps prepared.

Schelling also drops some icy twentieth-century military theory lines. The opening: “One of the lamentable principles of human productivity is that it is easier to destroy than to create” (xxi). “Against defenseless people there is not much that nuclear weapons can do that cannot be done with an ice pick. And it would not have strained our Gross National Product to do it with ice picks” (19). “By arranging it so that we might have to blow up the world, we would not have to” (43). “What can 7,000 American troops do [in the event of a major Soviet invasion], or 12,000 Allied troops? Bluntly, they can die” (47). “if we can talk about wars in which tens of millions could be killed thoughtlessly, we ought to be able to talk about wars in which hundreds of thousands might be killed thoughtfully” (178).

[John Scott · Rating 5 out of 5]

Schelling’s book is as relevant now as it was during the Cold War. This is the seminal book on deterrence, and important reading for anyone involved in or interested in the Great Power Competition taking place between the U.S and China. While a lot of the text focuses on nuclear deterrence (nuclear weapons serving as the ultimate deterrent), the book is relevant to all forms of deterrence. Schelling opens up discussing the miracle that is the nuclear “taboo” which is partially responsible for explaining how all of the nuclear powers have thankfully abstained from using nuclear weapons since the Hiroshima and Nagasaki bombings. There are so many excellent examples of how nations have done deterrence and compellence both well and poorly, and a handful of easy to understand concepts that support his overall theory on deterrence. All in all, reading the book makes the reader realize how empathetic one must be to play the deterrence game well, because if the message sent from one nation to another is received differently than intended, things can easily escalate towards conflict.

[clarkeackerman · Rating 4 out of 5]

4.5 stars. In the beggining I found this reading dense and really complicated to understand. But, after a few chapters I really started to appreciate it, and found Schellng's perspective interesting. I've never liked game theory before, but after reading this I have realized I actually love it. The key for this to happen is the way in which in approch. The author talks about game theory from a trully theoretical point of view in the context of internationa relations. Explaning the behavior of all actors and analyzing strategies to the core.

I know some people might argue that Schelling is cold in the way he talks about human life, but I think that is the way I more enjoy it.

[Jerry · Rating 1 out of 5]

The cat is black. Black is the cat. Now, imagine if I filled 303 pages with variations of that one statement. If you would conclude that such a book would not only be slightly above useless, but in fact would be a chore on par with any one of Hercules 12 Labors, your conclusion would be as mine is, MADDENING ! Having been the second book I have taken the time to read of late concerning government policy as regards to nuclear weapons I have reached the following opinion ; The complete global destruction that nuclear weapons represent has, for all intents and purposes (not to mention cost) has relegated them, and I do mean ALL of them, to threats of total destruction utilized by the respective countries who possess them to forward their diplomatic agendas. There you have it ! Unlike Thomas Schelling in Arms and Influence, I didn't need an additional 302 pages !

[Chasqui M.G. · Rating 4 out of 5]

4 stars

oh yeah schelling? well if you’re so smart how about you deter this fist from your face?

[Crystal · Rating 3 out of 5]

V tekky, bit boring though

[John Daley · Rating 5 out of 5]

"The most spectacular event of the past half century is one that did not occur. We have enjoyed sixty years without nuclear weapons exploded in anger." Schelling's spectacular events has now not occurred for nearly 80 years, a marvellous fact that would have seemed nearly unthinkable for long stretches of the Cold War during which the thread of nuclear annihilation was the dominant issue of public policy. This classic, clear-eyed and penetrating book, first published in 1966, broke new ground in the strategy of conflict in the age of nuclear weapons and remains highly relevant today for understanding the fundamental importance of nuclear arsenals - influence, not destruction - and why the taboo around the non-use of such weapons is so critical.

Schelling's key strategic insight is that nuclear weapons, by raising the cost of military conflict unacceptably high, divorced military power from coercive power. Until 1945, the ability to coerce an opponent rested on the credible thread of some form of military *victory*. Nuclear weapons alter this picture by allowing an opponent to inflict unbearably high costs even in the process of losing a war. in other words, nuclear capacity gave actors the ability to deter and compel adversaries without every actually using military power. Analyzing their actions, therefore, required a new type of strategic understanding: the strategy of coercion, in which both sides touted and invested in nuclear capacity while simultaneously explicitly and implicitly acknowledging that the benefit of avoiding nuclear war vastly exceeded any potential military gains.

Schelling's training as an economist is evident in his focus on incentives and decision-making. There is little, if any, discussion of technical or implementation details of carrying out nuclear strikes and there is strikingly little data about actual military conflict. Rather, the work is important for the rich and deep insights into how the altering of incentives through access to nuclear capabilities changes decision-making. In particular, Schelling incorporates concepts of reputation, chance and commitment from game theory to construct a theoretical framework of decision-making in the nuclear age. Regarding commitment, he argues that the ability to coerce opponents with nuclear weapons depends on making a credible commitment to inflict pain in the event of non-compliance and to *not* apply that pain in the event they do comply. Yet, commitments are hard to make and harder to verify. So, paradoxically, Schelling argues for reducing policy options and eliminating escape hatches to signal clearly to adversaries that, in the event of a particular escalation of event of non-compliance, there will be no choice but to inflict the painful nuclear cost. This shifts the escalation decision to your counterpart who now has the "last clear chance" to avoid catastrophe. By binding oneself to take an action that is intolerable to your enemy, you provide strong incentive for them to comply. He refines this concept through discussion of commitments to deter and compel, respectively. With this framework, policy decisions such as mutual self-protection treaties (NATO) and the ongoing presence of national troops in foreign countries yields strategic value by reducing policy options and binding the party to action in the event of an escalation by your enemy.

Another brilliant insight is Schelling's elucidation of brinkmanship, the deliberate introduction of chance into a conflict as a means of making coercing your opponent. This recognizes that the costs of nuclear conflict are so high that no one would rationally opt for a nuclear exchange, yet the element of chance introduces some likelihood of such exchange beyond the control of rational actors. By raising the expected cost so high, this element of chance again strongly incentivizes your enemy to comply with whatever demand you have made.

Finally, Schelling's concept of focal points is incorporated to explain the development of the convention, and now strong taboo around the use of nuclear weapons. This level of self-restraint by nuclear armed actors was not preordained, nor ever explicitly committed to. There were multiple plausible conventions regarding the use or non-use of nuclear weapons (multiple equilibria), yet the complete non-use was the clearest. Schelling analogizes this to natural geographic features and universal conventions, such as lat/long, to describe how parties in conflict can align on a course of action in the absence of explicit coordination. The resulting taboo on nuclear weapon use for any purpose is extraordinarily beneficial and it remains a vital goal of public policy to maintain.

Highly recommended.

[Christopher · Rating 3 out of 5]

This book was one of the required readings for a class I am currently taking. The author is a Nobel Prize winner for his contributions to game-theory analysis and this book is considered to be one of the classics on nuclear strategy. It's not hard to see why. While many books on nuclear deterrence and strategy go into the different policies and can get policy wonky, this book takes an almost philosophical approach to the questions that nuclear strategy and deterrence pose. Indeed, many of the thoughts that Mr. Schelling has apply just as much to conventional war as to nuclear war as deterrence, compellence, and just the threat of violence can be used to achieve national goals. It is fascinating. It is also incredibly ponderous. At times it feels like Mr. Schelling just recorded some thoughts on a tape recorder and had someone transcribe them into book as topics are tackled without any apparent rhyme or reason. And considering that one or two of his chapters are 60+ pages long, it can be difficult to track his thoughts. Still, this is a genuinely thought provoking book that, in spite of the end of the Cold War, has not lost its relevancy and, indeed, will not until nuclear weapons are abolished or they are used once again in war.

[Jennifer · Rating 4 out of 5]

Though the writing is oddly paced and strangely redundant (even within sentences), the discussion of how violence can be used as a means of coercion -- assuming clear communication, the deliberate assurance of options for concessions, an effective balance of capabilities, and so forth -- is hugely useful for thinking about force and influence. This is true not only for the Cold War, when Schelling wrote this, and not only in the context of nuclear weapons, which overshadows the book, but more generally.

[Jonah Lo · Rating 4 out of 5]

Well-written with enduring insights.
Also valuable as a historical text on the development of strategic thought and strategic studies.
Final chapter does tend to be very slow and too rooted in Cold War narrative for contemporary use though.

[Ellen · Rating 5 out of 5]

Weirdly reassuring to see how much academic thought and discourse has been going into nuclear deterrence and modern war, and how much posturing, even as Russia again threatens nuclear attacks as part of the war in Ukraine.

[Jon · Rating 5 out of 5]

This book gets better every time I read it.

[Tyler · Rating 4 out of 5]

If you’re looking for a tactical history or a battle narrative, this isn’t it. But if you want a serious strategic lens on how wars are controlled, signalled, and politically terminated through nuclear means, this is a must-read.

Arms and Influence is one of the more strategic books I’ve read in a long time, and it’s different than most “military books” because it isn’t obsessed with campaigns, units, or even battles. Schelling is focused on the part of war that most people skip over, how violence functions as a form of political communication, and how strategy is really about shaping decisions instead of simply destroying targets.

The biggest value for me was how clearly he separates deterrence from compellence, and how he shows that these aren’t just academic words—they’re different mindsets with different timelines, different credibility problems, and different risks. Deterrence is about preventing an action. Compellence is about forcing a change. Once you see that, you start noticing it everywhere: limited war, limited objectives, escalation control, and the constant tension between what the military wants to do operationally and what political leadership is willing to do strategically.

What makes this book powerful is that it forces you to confront that in the nuclear age, the target isn’t just the enemy’s army, it can be their cities. Nuclear weapons bypass armies and go straight to what people value most, which shifts warfare into a kind of bargaining contest where credibility and perception matter as much as capability. Schelling doesn’t romanticise this; he exposes how cold and morally heavy it is. If your threat isn’t credible, it won’t deter. But if it’s credible, it means you’re willing to cross lines that most of us don’t want to imagine crossing.

One of the most interesting parts for me was his discussion of how governments don’t decide like individuals. National decisions are the product of bureaucracy, politics, career incentives, party structure, public opinion, and civil–military tension. You can see that clearly in Korea and Vietnam, where military leaders often wanted to widen the fight for operational advantage, while presidents and civilian leadership were trying to avoid triggering a larger war—especially under nuclear shadow.

The ending—where he revisits his work decades later—was one of my favourite parts. It reinforces the idea that in modern conflict, “representation” matters almost like weaponry. If a uniformed service member is involved, or if the state is clearly represented, then it can be read as national participation, not just individual action. That political symbolism can have escalation weight of its own, even before you talk about warheads.

Overall, this is one of those books that doesn’t just give you facts—it changes how you think. It made me more sensitive to signalling, credibility, and the way nations try to coerce each other without sliding into catastrophe. I also left wanting a modern strategist to take this framework and update it for today’s world—especially with AI, drones, cyber, and all the new ways states can impose pain or deny capability without looking like traditional war. But that’s not a criticism as much as a compliment: the book is so foundational that it makes you want to build on it.

[Dennis Murphy · Rating 5 out of 5]

Arms and Influence by Thomas Schelling is one of the classics of international security literature. Coming out in the middle of the 20th century, there's a lot of empirics that no longer seem as intuitive without the historical context, but the underlying concepts - particularly as they pertain to security - remain solid. The last chapter, in particular, is rather excellent. The main focus of the book pertains to thinking through some of the strategic game centered around warfare and conflict in a nuclear age and whether the nuclear taboo is something that is truly going to become a settled norm in international conflict. There's a lot of talk about bargaining, strategy, uncertainty, signaling, conventional, and unconventional warfare. This book is from an era where a lot of these ideas were just starting to become solidified, though now much has since transitioned into the realm of common sense for defense policy wonks. So, its pretty great, if not a bit outdated and potentially basic for later students of the subject.

[Joseph Stieb · Rating 4 out of 5]

This book is worth reading but only if you are in certain fields (strategic studies, military history, diplomacy, poli sci). It's a seminal text on deterrence, compellence, coercion, and other facets of how to use arms to achieve influence. Schelling's core insight is that the point of arms, especially in the nuclear era, is to coerce others into doing what you want (or not doing what you don't want them to do), not necessarily using those arms to force them to do what you want. He makes a distinction between wars of destruction that usually have total aims and the more limited but constant use of force as a means of communicating resolve and capability and thereby influencing others. While the book is pretty dense, Schelling avoids too much heavy game-theorizing and explains these concepts in fairly accessible terms. There's a lot more to unpack in his argument, including the idea about stimulating and managing risk in order to force the other side to back down first, but I'll be teaching this book in a few weeks anyways and I'll have way more to say in my lesson plans.

[Maria · Rating 3 out of 5]

The ideas presented here about nuclear capabilities, war decisions and the calculation of risk are good. However, it reads like a droll textbook so I was often going off in my mind on tangents then had to rewind the Hoopla audio. Originally written in the late 60s, the focus is mainly on American versus Soviet ideologies, but it was updated a bit to include some more modern concerns.

What I found to be an amazing realization is that every action described here, whether hypothetical only or based on events in history, is covered in Craig Alanson's Expeditionary Force sci-fi series that kicks off with the book Columbus Day. As I listened to Schelling's circular explanations I'd recall moments in Alanson's fun books that spoke of the exact same dilemmas, but in a way that involved the reader and really made you both care about the outcome and invest yourself in the analysis of decision making. I'd like to know if Craig studied Schelling.

[C · Rating 3 out of 5]

It’s alright. Repetitive and academic…interesting but outdated. It’s a fascinating exploration of the value of nuclear deterrence that has mostly proven true. Some really interesting ideas here based on sound but potentially outdated logic. I wish there had been greater discussion of the author’s arguments without an a priori assumption that international organizations would maintain and persist in their power and influence. The active erosion of common interests, proliferation of cultural and political division, and perpetual escalation of genocidal and imperial rhetoric over the last 20 years has changed the calculus a bit on these arguments. But maybe that’s just me being cynical.

In the end, it’s an interesting and relatively defensible argument that is over stated and over explored in this work.

[Alyssa · Rating 4 out of 5]

It was good.
It made me think about strategy and deterrence in a different light. Honestly, he had me up until the acknowledgments.
When he started talking about how the US shouldn’t want to develop new technology for deterrence, he lost me.

Especially with how our adversaries are increasing their technology and their deterrence weapons, the US needs to think about ours. We are absolutely behind the curveball on this and modernization needs to be at the forefront. Innovation and modernization are the key to deterrence and if we can’t keep up with our peer adversaries, then what are we doing?

[Adam DuBard · Rating 4 out of 5]

Really enjoyed this one - I'd say it's more of a 4.5/5 than a 4, but I docked it a bit for some of Schelling's Vietnam takes aging very poorly. Overall this book really changed how I think about deterrence, military conflicts, and nuclear weapons in general. It's one of those books that opens your mind to new ways of thinking, and I think it's required reading for anyone interested in conflict management or diplomacy in general. I thought the afterword is also an excellent addition, reflecting on 60 years (at the time) of the nonuse of nuclear weapons. Here's to hoping that trend continues.

[Mads Floyd · Rating 5 out of 5]

Another uni book of deterrence theory, and another fantastic classic. Some of it is very out of date, simply because the technology behind the theory has adapted itself, yet the author here not only predicts this future, he even precludes himself by stating outright that much of his theory will fall to the wayside as technology advances. Few theorists have such humility and insight. Definitely a period piece.

[Carter · Rating 4 out of 5]

Schelling's work, which is I believe associated with the old RAND Corporation, was awarded a Nobel Prize in Economics, though his work is primarily in studying the implications of game theory on the analysis of war, especially mutually assured destruction, to due the Oppenheimer led Manhattan Project. Always interesting to see how theory matches reality, especially such a simple one.

[Kameron · Rating 5 out of 5]

I now see why this is essential reading for anyone who works in the nuclear weapons field. Many questions are discussed and many viewpoints analyzed. The analysis is widely applicable to politics, warfare, and everyday life. As one of the most-cited thinkers on deterrence, Schelling explains the language, thinking, and gamesmanship involved in deterrence theory.

[MacWithBooksonMountains Marcus · Rating 5 out of 5]

Professional work on strategy, government war planning , deterrence and an interesting concept called compellence.
There have been some new developments on the global stage with attendant shifts in balances and priorities which are incongruous to some of the author’s theories and conclusions. Nevertheless, it is an eminent work that is a must read in its field of study.

[Jonathan Z. · Rating 3 out of 5]

What it has to say about deterrence and the nature of war is very profound. However, how it makes its case is like listening to a rambling old man talk about what life was like when he was a kid. I recommend this as a skim and not reading to comprehend.

[Xaver · Rating 2 out of 5]

The most astonishishing fact about this book is that it is written by a Nobel laureate. I find it hard to follow the main thoughts as these are explained by lengthy examples which seem often not well chosen.

[Graham · Rating 4 out of 5]

A weak 4 but this is a classic. His Nobel speech afterword really ties a lot together and hammers home the importance of nuclear weapons as a tool of influence, rather than an actual weapon to be used. Some weird moments of pro-peaceful nuclear energy advocacy?