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The dual nature of nuclear deterrence arises from the blurred distinction between the use of nuclear deterrence as a political tool to prevent war and the practical use of nuclear weapons as a means of warfare. After all, any deterrence is only feasible if it relies on the material basis of nuclear weapons and the willingness to use them in accordance with military doctrine, strategy, and operational plans.

In today’s world, all states openly (or, like Israel, by default) maintain and improve their nuclear weapons for deterrence purposes. At the same time, no weapons system is actually created for deterrence, because it is too general and amorphous a concept for the military planners and arms designers. The development of all nuclear weapons systems integrates the latest technical achievements to perform specific military tasks: the destruction of certain military and civilian targets in the specified conditions of conflict. At the same time, certain technical aspects of weapons and related operational plans may increase the likelihood of a military conflict or its escalation. Today, all of this is happening under the influence of technological and military developments and new strategic concepts among the leading nuclear powers, and is being exacerbated by the growing political tensions between Russia and the United States.

The enormous destructive power and technical complexity of existing nuclear forces have effectively left critical political decisions hostage to strategic concepts and operational plans developed in military offices long before an outbreak of armed conflict. And these plans are dictated by the technical specifications of the weapons and their command-and-control information systems. With regards to the present day, the classical Clausewitz postulate can be reformulated as follows: war (at least global nuclear war) is no longer the continuation of policy by other means. It is the continuation of military doctrine and the technical specifications of weapons systems that determine the plans and methods of their employment.

An illustration of this is the concept of launch-on-warning as outlined by the Russian leadership. It is mainly driven by the vulnerability of strategic forces to a massive nuclear missile strike. However, this only relates to ICBMs in hardened silo launchers, underground command posts, missile submarines in bases, and bombers at airfields. Land-based mobile missiles on deployment routes, submarines at sea, and aircraft in the air are all able to survive nuclear attack and deliver a “deep second strike,” but this potential seems to be considered insufficiently destructive.

The “assigned level of damage” mentioned in the Russian military doctrine therefore probably implies that a launch-on-warning of silo-based missiles must be carried out against the aggressor, in particular, launches of the most powerful heavy-class ICBMs (such as the current SS-18 Satan and its upcoming follow-on Sarmat).26 And this means that the technical specifications of weapons (such as the inability to make mobile heavy-class liquid-fueled ICBMs, the hardness of their silos, as well as the number, yield, and flight time of the attacking warheads) would dictate the decision of the state’s leadership to end the world: to strike back before the arrival of nuclear attack, the consequences of which were so eloquently described in Putin’s speech at Valdai.

Meanwhile, the concept of launch-on-warning carries a fair risk of unintended nuclear war. This comes from the possibility of a technical failure of the missile attack warning system—which is composed of satellites and ground-based radars—or the unauthorized launch of missiles by the opponent, incorrect interpretations of the other side’s actions, or an uncontrolled escalation of a crisis or local armed conflict.

In the short term, this risk may grow significantly along with the development of military hardware and changes to the strategic balance. For example, space weapons and cyber warfare are likely to have the ability to disable early warning systems or trigger false alarms. The proliferation of sea-based nuclear missiles poses the risk of provocative “anonymous” third-party attacks from underwater. The development of hypersonic systems will deprive ground-based radars of the ability to determine, in a timely manner, the trajectory of enemy missiles and their impact area, which means that a launch-on-warning response will have to be authorized immediately upon detection from satellites, which periodically signal false alarms.

Finally, the collapse of the INF Treaty and the possible deployment of new U.S. medium-range missiles in Europe and Asia will, due to their short flight time or low trajectory, neutralize the Russian concept of launch-on-warning, as there will simply be no time for its implementation during an attack. According to statements by authoritative military commanders, this might force Russia to accept the concept of a preemptive nuclear strike.27 It is clear that such a strike would be more destructive than a purely retaliatory strike, but in any case, the subsequent nuclear retaliation by the enemy would be fatal for Russia. And if the United States accepts the concept of a preemptive strike, any possible crisis situation would force both sides to speed ahead of the other: not for any political reasons, but because of the vulnerability of Russian strategic forces and command-and-control system to the first strike by the other side.

Another example of the self-destructive tendencies of nuclear deterrence is the concept of a limited or selective nuclear war. The perennial question that strategic planners have fought over for decades is what to do if nuclear deterrence fails. These scenarios include if an attack by an enemy using conventional weapons threatens imminent defeat (including destruction of nuclear forces in bases using high-precision non-nuclear capabilities), if the other side uses nuclear weapons in any kind of limited way, or if it uses other weapons of mass destruction or cyber attacks.

From the early 1970s, the United States—starting with then secretary of defense James Schlesinger—promoted the concept of “retargeting:” various options for selective and limited strikes against Soviet military targets.28 But all of these plans were dashed by the likelihood of a massive nuclear response by the Soviet Union, which categorically rejected such ideas and strengthened the potential for a “devastating retaliation.”29

Changes began many years later. In 2003, in an official Ministry of Defense document, Russia announced plans for the “de-escalation of aggression [by] the threat to deliver or by the actual delivery of strikes of various intensity using conventional and (or) nuclear weapons.” As such, the document assumed the possibility of “dosed combat employment of selected components of the Strategic Deterrence Force.”30

It should be noted that, since then, subsequent editions of Russian military doctrine and other official strategic documents have made no mention of such concepts. At the same time, the adopted doctrinal formulations do not exclude such actions, since they do not specify how Russia can “use nuclear weapons … in the event of aggression against the Russian Federation with the use of conventional weapons when the very existence of the state is in jeopardy.”31 Neither is it clear when and how exactly the existence of the state can be considered in jeopardy, and what level of damage to the enemy is interpreted as sufficient.32 The United States is not transparent about these points either, but officially allows for the possibility of a limited nuclear war.

Amid the current escalation of tensions, politicians and military experts in Russia and the West have renewed their focus on this concept. A number of publications by Russian military specialists (in active service) justify

“the limited nature of a first nuclear strike, which is designed not to harden, but rather to sober up an aggressor, to force it to halt its attack and move to negotiations. In the absence of the desired reaction, provision is made for increasing the mass of nuclear weapons brought to bear, both in quantitative terms as well as their energy emission (that is, destructive power). Therefore … a nuclear first strike by the Russian Federation could have a limited character.”33

However, in his address to the Federation Council on March 1, 2018, Putin said: “Any use of nuclear weapons against Russia or its allies, weapons of small, medium, or any yield at all, will be considered as a nuclear attack on this country. Retaliation will be immediate, with all the attendant consequences.”34 Implicitly, this may mean that a limited nuclear war is not envisioned in Russian doctrine and planning either, but this important issue might benefit from an unequivocal official clarification.

The United States has included the concept of a limited nuclear war in its nuclear doctrine for many years in the form of “tailored nuclear options.” But in the 2018 Nuclear Posture Review, this topic took on a central role and became the main innovation of Trump’s nuclear strategy. The review states:

“Recent Russian statements on this evolving nuclear weapons doctrine appear to lower the threshold for Moscow’s first use of nuclear weapons. Russia demonstrates its perception of the advantage these systems provide through numerous exercises and statements. Correcting this mistaken Russian perception is a strategic imperative. To address these types of challenges and preserve deterrence stability, the United States will enhance the flexibility and range of its tailored deterrence options.”35

For limited nuclear strikes, the plan is to equip part of the Trident-2 submarine-launched ballistic missiles (SLBMs) with low-yield warheads, as well as to develop long-range standoff (LRSO) air-launched missiles, guided bombs with variable yields (such as the B61-12) for tactical and strategic bombers, and new sea-launched cruise missiles with nuclear warheads.36

No matter how much the deterrence doctrine is used to justify such capabilities and proposals, they actually reduce the nuclear threshold and increase the likelihood of any armed clash between the superpowers escalating into a nuclear conflict with a subsequent exchange of mass nuclear strikes.

Another controversial response to the question of what to do in the event that deterrence fails is the concept of damage limitation in a nuclear war. The recent U.S. Nuclear Posture Review says: “The goal of limiting damage if deterrence fails in a regional contingency calls for robust adaptive planning to defeat and defend against attacks, including missile defense and capabilities to locate, track, and target mobile systems of regional adversaries.”37

Although this passage refers to regional adversaries, Russia sees itself as a target of these plans (likewise, it feels threatened by U.S. missile defenses and long-range high-precision conventional weapons). In a nuclear war, the desire to limit damage to one side by offensive operations looks like a threat of disarming strike to the opposite side, especially when it comes to destroying Russia’s highly survivable forces, which in the form of mobile ICBMs are associated mainly with the concept of “deep second strike”—the basis of the philosophy of strategic stability.

Another dangerous area in which the degradation of nuclear deterrence is happening is the development of a variety of long-range (over 500 kilometers) strike systems capable of delivering conventional warheads to targets that could previously only be destroyed with nuclear weapons. This has been made possible by new command-and-control information systems (including in space) and the miniaturization of electronics, which can significantly improve the accuracy of the guidance systems (allowing down to several meters of circular error probability).38

Existing non-nuclear cruise missiles have a relatively limited range (less than 2,000 kilometers), subsonic speeds, and a long flight time to targets (about two hours). Yet the next generation of high-precision hypersonic or ballistic conventional weapons under development will make it possible to deliver these kinds of strikes at intercontinental ranges (over 5,500 kilometers) with a relatively short flight time (up to 60 minutes).39

Non-nuclear long-range conventional systems are designed for and used by the superpowers primarily in regional wars (Iraq, the Balkans, Afghanistan, Libya, and Syria). However, they impinge on the strategic balance through the concept of “conventional deterrence,” which has long been proclaimed in official U.S. documents,40 and since 2014, in the Russian military doctrine, which states that: “The use of high-precision weapons is envisaged by the Russian Federation within the framework of performing strategic deterrence use-of-force measures.”41 Initially, this concept was conceived as the preferred alternative to a reliance on nuclear weapons and a way of raising the nuclear threshold. But, in fact, the opposite has turned out to be true: it results in lowering of the threshold.

The issue of whether the accuracy of these capabilities will be sufficient to destroy hardened targets (ICBM silos and underground command posts) and whether they will be able to destroy ground-mobile missiles remains highly uncertain. However, there is no doubt that non-hardened strategic nuclear facilities are vulnerable even to existing subsonic non-nuclear cruise missiles. These include missile and air defense radars, light mobile ICBM shelters, submarines in port, bombers at base, forward nuclear warhead depots, and spacecraft control stations. These objects could be hit even in the event of a regional conflict between Russia and NATO.

In addition, many current and future weapons of this kind, as well as their launchers, are dual-purpose, and their character until the moment of detonation will be indistinguishable from a nuclear strike. This applies to heavy and medium bombers, tactical strike aircraft with missiles and bombs, ships, and attack submarines with missiles capable of carrying both nuclear and conventional warheads: the Kalibr and Tomahawk sea-based cruise missiles,42 air-launched cruise missiles of the Kh101/102 type or the AGM-158, and Iskander-type ground-launched tactical ballistic and cruise missiles. Such systems and associated operational plans could also trigger the rapid, uncontrolled escalation of a conventional local conflict or even a military incident into nuclear war.

Neither Russia nor the United States—nor their allies—want war, and they have no real political motives to unleash it. But it should be remembered that in many wars, both sides believed that they were only defending themselves, fighting off real or probable aggression, even if it was they themselves that carried out offensive operations. That is how World War I began in 1914. That conflict shaped the follow-on terrible history of the twentieth century, and its consequences are still playing out across the world, including in Russia. The Cuban Missile Crisis of 1962 demonstrated clearly that a nuclear war could begin because of a loss of control over events, not as the result of planned aggression. Similar, though less dangerous, cases occurred during the Berlin crisis of 1961 and during three Middle East wars in 1956, 1967, and 1973, among a number of other similar situations.

Since the events of 2014 in Ukraine, intense military confrontation between Russia and NATO has been renewed in Eastern Europe, the Baltic and Black Seas, and the Arctic. Regular large-scale military exercises (including with the participation of strategic systems and the imitation of nuclear weapon use) are frequent demonstrations of force.43 Dangerous close encounters of combat ships and aircraft are a common occurrence. The possibility of a major war between Russia and NATO, which seemed irrevocably consigned to the past just a few years ago, hangs over Europe and the world.