At the time, the Soviet Union and United States committed to reducing their nuclear arsenals, eliminating an entire category of nuclear weapons, and allowing thorough onsite inspections to ensure treaty compliance. During the Cold War, the INF Treaty served as a crucial stabilizing mechanism in the global nuclear order. Historically, the Strategic Arms Limitation Talks (SALT) of 1972 and 1979 were the first of several agreements between the US and the Soviet Union. As a result, both sides agreed to reduce their strategic weaponry, which included ballistic missile defenses, submarine-launched ballistic missiles, and intercontinental ballistic missiles.

In 1987, Ronald Reagan and Mikhail Gorbachev signed the INF Treaty. Additionally, they established inspection procedures to make sure both parties followed the agreement. Due to the treaty, 2,600 missiles were destroyed, marking a significant Cold War breakthrough. Despite decades of arms control, the US and Russia still field the largest nuclear forces. Although it is challenging to determine the exact extent of their stockpiles, the Stockholm International Peace Research Institute (SIPRI) estimates that the US possesses 5,328 warheads, while Russia has 5,580.

In August 2025, Russia declared it would no longer fulfil its commitments under the INF Treaty, citing increasing threats from the United States and other Western nations. When the US withdrew from the INF Treaty in 2019 because of Russian noncompliance with treaty limitations, Moscow stated that it would not use such weapons as long as Washington did not. This may have served as an effective ruse, but it served a purpose.

Questions are increasing about the utility of nuclear proliferation, the threat of arms racing, and the future of nuclear deterrence following the decision of Russia to fully abrogate the INF Treaty. The collapse of the INF Treaty represents a significant shift in the trajectory of international arms control.

The situation took a more dramatic turn as President Donald Trump announced that the US would move two of its nuclear-armed submarines closer to Russia in reaction to the “inflammatory statements” issued by former Russian President Dmitry Medvedev. This action highlights the challenge that arises when arms control breaks down—the potential for misunderstandings and overreactions increase.

Among nuclear-armed states, communication, predictability, and a certain measure of self-control are essential elements of nuclear deterrence. They were shaped by the INF Treaty, which placed verifiable limitations on missile sites. With the failure of the INF Treaty, useful tools were removed.

The future deployment of intermediate-range systems in regions that were shielded from them may prove an urgent strategic issue. Once at the epicenter of Cold War nuclear worries, Europe may have to host such weapons once more, but with improved accuracy, shorter travel times, and, perhaps, lower yields.

Deterrence dynamics in the Asia-Pacific are more difficult, especially between the US, China, and Russia, after the INF Treaty. The great powers are now accelerating nuclear modernization, while non-nuclear states are reconsidering their nonproliferation commitments. A replay of the Cold War–era European missile crisis has emerged with the collapse of the treaty.

Now, both Russia and the US are free to use and develop short-, medium-, and intermediate-range missiles without any official restraints. One more issue concerns the intentions of other governments, who may be influenced by the deterioration of controls on nuclear systems. States that did not previously possess nuclear weapons may choose to acquire them. Modern arms racing may be fast, less predictable, and more destabilizing due to technological advancements, such as autonomous delivery systems, hypersonic weapons, and AI-assisted targeting.

There are limited prospects for cooperative tools to mitigate these risks of escalation between the US and Russia. The two largest nuclear powers have a special duty to control and limit the scope of their competition.

Measures that encourage openness, trust, and communication between nuclear and non-nuclear governments will be crucial. In the absence of a global treaty, regional security accords, tailored to today’s security challenges, can effectively restrict risky deployments and restrain great powers from further modernizing their nuclear arsenals.

Nations in the Asia-Pacific can, for example, agree to mutual missile deployment restrictions similar to those in the INF Treaty’s verification procedures, which include regular inspections and satellite monitoring by mutual compliance. This would prevent insecure military build-ups in the region and reduce mistrust between states. Whatever course nations take, the importance of preventing escalation to nuclear use is foremost.

Nazia Sheikh is a Research Officer at the Centre for International Strategic Studies, AJK. Views expressed in this article are the author’s own. 

The Uncertain Future of Nuclear Deterrence and Proliferation was originally published on Global Security Review.

Hypersonic technology encompasses both aircraft and missiles that travel at speeds exceeding five times the speed of sound. These vehicles leverage advanced propulsion systems, such as scramjets (supersonic combustion ramjets), to achieve and sustain such high velocities. The potential applications of hypersonic technology are vast, ranging from rapid global strike capabilities to enhanced missile defense systems.

However, interest in hypersonic technology is not new. Scientific research began during the Cold War, but only in recent years have significant breakthroughs been made towards advancing hypersonic technology from theory to practicality. The primary drivers of this renewed focus include advancements in materials science, computational fluid dynamics, and propulsion technology. Nations such as the United States, China, and Russia are at the forefront of hypersonic research, each vying for technological supremacy, with China and Russia attempting to challenge the status quo.

The strategic advantages of hypersonic technology are multifaceted. One of the most significant benefits is the ability to deliver payloads at unprecedented speeds, drastically reducing the time available for adversaries to detect, track, and intercept these threats. This capability enhances both offensive and defensive operations.

Hypersonic vehicles can reach their targets much faster than conventional missiles or aircraft. This rapid response capability is crucial in scenarios requiring immediate action, such as neutralizing high-value targets or responding to emerging threats. The ability to strike quickly and precisely could deter adversaries from initiating conflict, knowing that retaliation would be swift and devastating.

The high speed and maneuverability of hypersonic vehicles make them difficult to detect and intercept. Traditional air defense systems, designed to counter slower, more predictable threats, may struggle to adapt to the dynamic flight paths of hypersonic weapons. This enhanced survivability increases the likelihood of mission success, particularly in contested environments.

Hypersonic vehicles can cover vast distances in a short amount of time, providing global reach without the need for forward-deployed bases.

This capability is especially valuable for nations looking to project power and influence across the globe. It also reduces the logistical burden associated with maintaining overseas bases and allows for more flexible deployment strategies.

Despite their potential, hypersonic technologies face significant technological challenges. Overcoming these obstacles is essential for the successful development and deployment of hypersonic systems.

One of the primary challenges is managing the extreme heat generated during hypersonic flight. At speeds exceeding Mach 5, air friction can cause the surface temperature of a vehicle to reach several thousand degrees Celsius. Developing materials and cooling systems capable of withstanding and dissipating this heat is crucial to maintaining the structural integrity and performance of hypersonic vehicles.

The materials used in hypersonic vehicles must endure not only high temperatures but also extreme pressures and aerodynamic forces. Advanced composites, ceramics, and metal alloys are being developed to meet these demanding requirements. Researchers are also exploring innovative manufacturing techniques, such as additive manufacturing, to create components with enhanced durability and performance.

Maintaining control and accuracy at hypersonic speeds is another significant challenge. Hypersonic vehicles must navigate through rapidly changing atmospheric conditions, requiring sophisticated guidance and control systems. These systems must be able to make real-time adjustments to the vehicle’s trajectory, ensuring that it stays on course and reaches its intended target.

Developing reliable propulsion systems capable of sustained hypersonic flight is a major technological hurdle. Scramjets, which operate efficiently at hypersonic speeds, are still in the experimental stage. Achieving a balance between thrust, fuel efficiency, and structural integrity is critical for the success of these systems.

The deployment of hypersonic technology has profound strategic implications for global security. As nations race to develop and deploy hypersonic weapons, the balance of power could shift, necessitating new defense strategies and international regulations.

The development of hypersonic technology has the potential to trigger an arms race among major powers. Nations may feel compelled to develop their own hypersonic capabilities or invest in advanced defense systems to counter these threats. This escalation could lead to increased military spending and heightened tensions on the global stage.

Hypersonic weapons could enhance deterrence by providing a credible and rapid response option. However, their deployment also raises the risk of miscalculation and escalation. The speed and unpredictability of hypersonic weapons could shorten decision-making windows, increasing the likelihood of accidental or preemptive strikes. That said, the opportunity to discuss potential gains and losses for both development and implementation of hypersonic weapons is an opportunity to help drive future strategy development.

Developing effective countermeasures against hypersonic threats is a priority for many nations. Advanced radar systems, directed-energy weapons, and missile defense systems are being explored as potential solutions. Integrating these technologies into existing defense frameworks is essential for maintaining a robust defense posture.

The proliferation of hypersonic technology underscores the need for international regulations and agreements. Establishing norms and guidelines for the development, testing, and deployment of hypersonic weapons could help mitigate the risks associated with their use. Diplomatic efforts to promote transparency and confidence-building measures are crucial for maintaining global stability.

Regardless of the naysayers, hypersonic technology represents the next frontier in military airpower, offering unparalleled speed, agility, and reach. While the strategic advantages are significant, the technological challenges and strategic implications cannot be overlooked. As nations continue to invest in hypersonic research and development, the race for air superiority will intensify, shaping the future of global security. Balancing the benefits and risks of hypersonic technology will be essential for ensuring a stable and secure international environment.

Joshua Thibert is a Contributing Senior Analyst at the National Institute for Deterrence Studies (NIDS) with nearly 30 years of comprehensive expertise, his background encompasses roles as a former counterintelligence special agent within the Department of Defense and as a practitioner in compliance, security, and risk management in the private sector. His extensive academic and practitioner experience spans strategic intelligence, multiple domains within defense and strategic studies, and critical infrastructure protection.

Hypersonic Horizons: The Next Generation of Air Superiority was originally published on Global Security Review.

These early civil defense measures were eventually neglected and then forgotten after the Berlin Wall came down in 1989 and the Soviet Union ended in 1991. Such measures were mirrored in the USSR under General Secretary Nikita Khrushchev, but by no means neglected afterward.

Civil defense is, by nature, a community-wide activity. The more people participate and help, the better the results for the entire citizenry. This includes improved morale and will to resist, fewer combat casualties, and prolonged lifespans in case of conventional or nuclear war.

The organization of processes, the laying down and buildout of infrastructure, the first-responder rehearsals, and pervasive homefront readiness drills all require group dedication in the face of natural popular skepticism, even active resistance by a vocal few.

Although there is ample room for volunteerism, and for more formalized national service (especially for those well above military draft age), governments at different levels do need to take overall charge. This ensures efficient coordination, direction of available funding into the most pressing needs, and arranging for efficient communication and reasonable compliance.

With Vladimir Putin’s many nuclear threats, it is once again time to ensure the nation has effective civil defenses against nuclear employment. It may not be the 1950s and 1960s, but civil defense matters.

This is perhaps a prime case where today’s financial-industrial and high-tech oligarchs (billionaires) can work with and/or under contract to the federal government, or even on their own initiative, to assure that, for example, America is hardened against electromagnetic pulse attack, cyber assaults, and nuclear and other weapons of mass destruction attacks. These may not be traditional civil defense measures, but they are civil defense for the modern era.

This collaboration is already happening in the space domain where President Putin’s “Sputnuke” threatens to totally disrupt space operations, and where President Xi Jinping’s growing space-dominance capabilities threaten to disrupt current civil society.

Effective civil defense measures are as central to effective nuclear deterrence and ally assurance as is nuclear modernization. Effective civil defense also includes ensuring the societal supporting infrastructure, such as housing, hospitals, and food stocks, are secure and survivable under even the most highly stressed circumstances.

In fact, an essential component of a truly superb American deterrence strategy must be a comprehensive program of being able to absorb an attack and nevertheless survive. Only in this way can the United States make it clear to adversaries, as President Richard Nixon said, “Not today, Comrades. Not ever.”

Church and synagogue groups, nongovernmental organizations (NGOs), such as the Red Cross or Doctors without Borders, and fraternal organizations, such as the Shriners or the Boy Scouts can also play a significant role in providing the ultimate in community civil defense. Examples of such efforts abound from the current conflict in Ukraine and Israel.

Exactly how much civil defense is the right amount? Nuclear strategists Thomas Schelling and Herman Kahn were never able to agree. Such agreement is even less likely today.

The right answer to civil defense is likely a programmatic solution that is affordable and optimizes the strengths of local communities. The right amount of civil defense should be a discussion between the federal, state, and local governments. The challenge for any civil defense effort is that more than two-thirds of all federal spending and about half of all state spending are dedicated to mandatory social programs. This leaves very little room for civil defense programs, which must compete with all other government functions for an ever-dwindling percentage of federal and state budgets.

For most Americans, the threat of nuclear strikes on the homeland is an abstract threat. Thus, they would rather have immediate government services than look to an event that may never happen. This leaves the prospects for improving civil defenses low. Much as in the Cold War, it may be up to Americans to look to their survival in the event of the unthinkable.

Joe Buff is a Senior Fellow at the National Institute for Deterrence Studies. The views expressed are his own.

Modernizing Civil Defense Is Wise was originally published on Global Security Review.