We tend to think about deterrence in terms of capability. How many ships? How many aircraft? How much intelligence? How resilient are our networks? How credible are our alliances? How quickly can we respond? These are important questions. They are also increasingly insufficient. Modern deterrence is no longer simply about possessing the capability to punish an adversary for an action, or even the capability to deny that action. It is about shaping the conditions in which an adversary makes decisions. It is about influencing where they can act, when they can act, what they can achieve, and whether the system they are seeking to pressure will respond in the way they anticipate. That changes the question. Instead of asking only whether we can deter an adversary, we should ask:
Where can they act?
When can they act?
Can the adversary exploit the relationships within our system?
Does the system actually work under pressure?
The first three answers can be expressed rather simply: Not Here, Not Now and Not Alone. The fourth asks whether we have actually built something that works.
Deterrence is widely discussed, but not always understood in the same way. This briefing approaches it from a different direction. Rather than asking only what capabilities we possess, it asks where deterrence operates, how time can be used as an instrument, and whether the relationships between the components of a strategic system allow those capabilities to generate effect. Not Here. Not Now. Not Alone. And, ultimately, Not Bad.
Spatial Deterrence- Not Here
Where can an adversary act? The obvious answer is geography: a border, a port, a sea lane, an airspace, a military base. However, modern competition has made that answer considerably more complicated. The relevant geography may be physical, digital, economic, informational or political. It may be a piece of critical infrastructure, an undersea cable, a satellite, a financial system, a supply chain or a border region. It may also be a jurisdiction or a network. Spatial deterrence is therefore not simply about protecting territory. It is about denying an adversary a viable location or vector from which to generate the strategic effect they seek.
The objective is not necessarily to prevent the adversary from acting. In many cases, it may be impossible to prevent every action or to eliminate every avenue through which pressure can be applied. The objective, therefore, is to ensure that the action does not produce the strategic effect the adversary is seeking, and that the pathway they have chosen becomes unproductive. For example:
· An adversary may be able to penetrate a network, but not disrupt the services that matter.
· They may be able to interfere with an information environment, but not alter decision-making.
· They may be able to create disruption around a critical infrastructure system, but not produce strategic paralysis.
The adversary may still be able to operate somewhere (but not here), yet that does not necessarily mean that they can achieve what they came to achieve there. This is deterrence by denial expressed spatially.
This dimension also highlights the distinction between general and specific deterrence. Specific deterrence seeks to prevent a particular action in a particular circumstance. General deterrence is broader. It seeks to shape adversary behaviour across a wider range of circumstances and domains. The distinction becomes increasingly important when threats move between domains. If military access is denied, pressure may move into the cyber realm. If cyber access is denied, the adversary may exploit economic dependencies. If economic coercion produces insufficient effect, information operations may be used. If direct action is too costly, proxies may be employed. The threat does not necessarily disappear because we have closed one door. It may simply look for another.
This is why spatial deterrence cannot be solely understood as a collection of isolated defensive positions. It requires an understanding of how pressure moves. A port does not exist independently of the logistics network that supports it. An undersea cable does not exist independently of the communications systems that depend upon it. A border does not exist independently of the political, economic and informational systems operating on either side of it. The geography of modern deterrence is therefore increasingly a geography of connections.
This is where the seam becomes important. Adversaries are unlikely to respect the organisational boundaries we have created for ourselves. They can move between jurisdictions, between agencies and between domains precisely because those boundaries are often where responsibility becomes unclear. The seam is not necessarily a weakness in capability. It can instead be a weakness in ownership and coordination. Everyone may own part of the problem. Nobody may own the effect. That creates opportunity. The seam therefore has both a spatial and systemic dimension. Spatially, it is a boundary or point of transition through which pressure can move. Systemically, it is the gap between actors, authorities or institutions where responsibility becomes unclear. The same seam can therefore appear on two maps: the map of where the adversary can act and the map of how our system works.
Not Here: Testing Spatial Deterrence
A useful way of testing spatial deterrence is to begin with a simple question: If we deny the adversary this location, where do they go next? For example, take a critical infrastructure target and consider the different systems, dependencies and relationships through which pressure could be applied. The purpose is not simply to identify vulnerabilities. It is to identify relocation opportunities. If one route is closed, what is the next route? If one domain is defended, where does pressure migrate? If one actor is resilient, which relationship around them is not? The exercise is therefore not about building a wall around everything. It is about understanding the strategic geography of the system well enough to identify where an adversary may seek an alternative pathway to effect.
Temporal Deterrence- Not Now
Where can the adversary act is only half of the question. The other half is: When can they act? Time is often treated as a background condition of strategy. It is not. Time can be an instrument of deterrence. An adversary seeking a quick political or strategic gain needs a particular timing or tempo. They need events to develop faster than we can understand them, coordinate a response or mobilise resilience. Resilience should therefore already be mobilised before disruption occurs. If the adversary can control the tempo, they can create opportunities to shape circumstances, manipulate information, narratives and perceptions before the system has had time to react.
That makes tempo control a form of strategic advantage. Tempo is not synonymous with speed. Tempo is control over the pace of interaction. Sometimes speed is exactly what the adversary wants. When attribution is unclear, when information is incomplete or when the consequences of miscalculation are significant, the ability to slow down can be as important as the ability to accelerate. A capable system must therefore be able to do both. It must be able to move quickly when clarity exists, but it must also be able to introduce deliberate delay when uncertainty is high. That is not indecision. It is control.
An adversary may be prepared to sustain pressure for months or years if they believe that their opponent requires an immediate political response. If that expectation is denied, the calculation changes. The quick win becomes less certain. The cost increases. The payoff becomes harder to realise. Temporal deterrence therefore involves more than response time. It involves controlling the relationship between time, uncertainty and decision-making.
This also changes the traditional conception of deterrence as something that is activated when crisis approaches. Modern deterrence requires continuity, with the system signalling, adapting, observing and responding all the time. There is therefore no clean point at which deterrence switches on. This matters because an adversary is constantly learning from what they observe: they test thresholds, observe responses, look for inconsistency, measure political attention and assess how long institutions take to coordinate. They also learn where decisions slow down, where narratives fracture and where responsibility becomes ambiguous. Each of these observations becomes part of their calculation, which means that structured unpredictability can become an important component of temporal deterrence.
Our core commitments should be clear, and the adversary should understand what matters to us. At the same time, they should not necessarily know exactly when, where or how we will respond. The objective is not unpredictability for its own sake, but to deny the adversary the ability to turn our predictable behaviour into a timetable. This is a subtle distinction: predictability in commitment, uncertainty in execution. This creates a more difficult calculation for the adversary, without creating unnecessary ambiguity about what we stand for.
The decision advantage problem
The familiar OODA loop, observe, orient, decide, act, remains useful here as a way of thinking about decision advantage. However, the modern problem is that we rarely have one OODA loop. We have many: intelligence, political decision-making, military presence, movement and operations, markets, social media and public communication. Sometimes, these temporal discrepancies can create opportunities for advantage, but they can also create gaps that an adversary may exploit. These processes are not necessarily independent of one another. Political decisions may be informed by intelligence, but they may also be shaped by economic developments, public communication or changes in the information environment. Equally, developments in one part of the system can alter the information available to decision-makers elsewhere. A decision can therefore be technically fast but strategically slow if the information required to make it coherent has not arrived. Equally, a delayed decision can be strategically faster if it prevents unnecessary escalation or avoids acting on manipulated information. Temporal deterrence therefore asks a more sophisticated question than: How fast can we respond? It asks: Can we control the tempo of the interaction?
Not Now- Testing Temporal Deterrence
Temporal deterrence can be tested by taking a single scenario and examining how the system performs under different conditions. Where the facts are clear, the first question is how quickly the system can act. Where the event is real but attribution remains uncertain, the focus shifts to where uncertainty introduces delay into decision-making, and who determines what can safely be done while that uncertainty remains. A third iteration can then introduce deliberate information overload, raising the question of who determines what is signal and what is noise. The purpose is not simply to measure response time, but to establish whether the system is able to control the tempo of an interaction or is instead being driven by it. A system can have excellent capabilities and still lose decision advantage because it is operating at the wrong speed. Sometimes the most effective deterrent is the credible ability to say: Not now.
System Deterrence- Not Alone
The third question is different. It is not about where or when, but about relationships. Modern deterrence does not reside within a single institution. Rather, it emerges from the interaction between institutions, capabilities, infrastructure, alliances and society. C4ISR provides a useful illustration of how capabilities and functions connect and operate together within a military context. Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance are often described as a technological architecture, or as the military’s nervous system, linking sensors, communications systems, intelligence and commanders so that information can be collected, transmitted, processed and turned into decisions and action. Its effectiveness, however, depends on how these different components connect and operate together. A sensor produces information. A communications system moves it. Computers process it. Intelligence turns information into understanding. Command and control turn understanding into decisions and action. The value does not sit entirely in any one component. It emerges from the connections between them.
That observation has a much wider application. A government can possess exceptional intelligence and still fail to act if the information does not reach the right decision-maker. A military can possess extraordinary capability and still fail to generate strategic effect if it cannot connect that capability to political purpose. An alliance can possess enormous collective power and still become vulnerable if disagreement between its members creates an exploitable seam. An economy can be resilient in aggregate while remaining exposed through a single dependency. The capability exists. The connection does not.
This is why adversaries increasingly seek to exploit relationships and dependencies alongside capabilities:
- They do not necessarily need to destroy the military. They can disrupt the relationship between military capability and political decision-making.
- They do not necessarily need to destroy a communications system. They can flood it with information.
- They do not necessarily need to break an alliance. They can amplify disagreement within it.
- They do not necessarily need to defeat societal resilience. They can undermine trust in the institutions responsible for exercising it.
The objective may therefore be not to destroy a capability but to disconnect it from the relationships that make it strategically useful. This is what System Deterrence is trying to prevent. It is deterrence that denies the adversary the ability to turn relationships within the system into strategic vulnerabilities. It is deterrence that protects networks, seams and joints.
And this is where coherence becomes critical. Coherence is not unanimity. A system does not have to agree on everything to deter effectively. Indeed, democratic states and alliances will inevitably contain disagreement. The question is whether disagreement becomes fragmentation. A coherent system can debate, disagree and adapt while retaining the capacity to make decisions and act. A fragmented system may possess greater capability on paper and still be strategically weaker.
This is why modern deterrence cannot be the responsibility of a single agency alone. A ministry, military service or intelligence organisation may have responsibility for particular elements, but effective deterrence depends on how those elements connect across the system. Deterrence is therefore not simply the responsibility of one organisation. It is a condition that has to be created and maintained across the system.
Not Alone- Testing System Deterrence
A national security scenario can be used to examine not only the capabilities involved, but the relationships between them. The question is whether those relationships are sufficiently robust to maintain strategic effect under pressure. The assessment should identify where critical connections exist, where seams may emerge, and where disruption to one part of the system could create consequences elsewhere. Subsequently, if one connection is removed, what happens to the system? That is often where the real vulnerability appears.
Not Bad- What does good deterrence look like when the three dimensions come together?
The final consideration of this briefing is: Does the system actually work? This is where we get to Not Bad. Good deterrence does not mean perfect deterrence. It does not mean that nothing gets through, that everyone agrees, or that every vulnerability has been eliminated. Good deterrence is something more demanding. It is the ability to remain strategically effective when the environment is changing and the system itself is under pressure.
That begins with coherence over unanimity. The objective is not to remove disagreement, but to prevent disagreement from becoming exploitable fragmentation. It also requires continuous deterrence, rather than deterrence that is activated only when a crisis begins. The relationships that matter must already exist, decision pathways must already be understood, and the ability to communicate must already have been tested. The system must already know how it will operate when information is incomplete and pressure is high.
It also requires us to recognise resilience as an active signal. Resilience is usually discussed in terms of what happens when disruption occurs: whether critical functions can absorb a shock, continue operating and recover afterwards. But this is only one part of its strategic value. A system that is visibly capable of absorbing disruption changes the calculation before disruption occurs. If an adversary cannot be confident that an attack, coercive measure or disruption will produce the effect intended, the value of that action is reduced before it is even taken. Resilience therefore has a deterrent function of its own. It is not simply what allows a system to survive an attack after deterrence has failed. It can help make the attack less attractive in the first place.
Good deterrence also requires structured unpredictability. Commitments should be clear, but the response should not necessarily be predictable. Structured unpredictability also depends on coherence capability. Coherence does not require every part of the system to communicate in exactly the same way, nor does it preclude deliberate ambiguity or deception. The question is whether apparent inconsistency creates an exploitable contradiction or contributes to the strategic effect being sought.
Good deterrence also requires error management. We often focus on adversary intent, but in a complex system, miscalculation can be as dangerous as deliberate action. A technical failure, for example, can be mistaken for an attack, while a defensive movement may be interpreted as preparation for escalation. Similarly, a political statement may be understood differently by an ally, an adversary and a domestic audience, depending on the context in which it is received. As a result, a system that cannot recognise and manage these possibilities may inadvertently create the very escalation it is trying to deter. Good deterrence therefore requires mechanisms for checking assumptions, challenging assessments and recognising when uncertainty is being deliberately manufactured.
Finally, there is an ethical dimension. Deterrence cannot be judged only by whether it imposes a cost on an adversary. If the pursuit of strategic effect creates unnecessary damage to civilian systems, third parties or the wider society we are trying to protect, the long-term credibility of the system is weakened. Good deterrence therefore has to remain strategically sustainable. The objective is not simply to win the confrontation, but to preserve the system’s ability to function afterwards.
The problem with capability
This brings us back to where we started. We measure capability. We measure readiness. We measure resilience. We measure resources. We measure interoperability. But how well do we measure the ability of those things to work together when pressure is applied? That may be the more important question. Interoperability tells us whether systems can work together. Coherence asks whether they can work together in a way that produces strategic effect. That distinction matters. Power provides options. Interoperability connects those options. Coherence converts them into strategic effect. And this is why deterrence increasingly needs to be understood as something that a system does, rather than something that a state simply possesses.
A deterrent system has to organise, coordinate, communicate, decide, adapt, learn and regenerate after disruption. It also has to maintain enough diversity of capability and perspective to retain options, without allowing that diversity to become fragmentation. These are not static characteristics. They are behaviours. The strategic system is continuously organising itself in response to an environment that is also continuously changing. This is where the three dimensions come together. Spatial deterrence denies the adversary a useful place. Temporal deterrence denies the adversary control of time. System deterrence denies the adversary the ability to exploit the relationships between us. Good deterrence is what happens when those three conditions continue to hold under pressure.
The real objective
There is one final question. What is the adversary ultimately trying to take from us? Perhaps it is territory. Perhaps it is capability. Perhaps it is access. Perhaps it is information. Perhaps it is trust. But increasingly, the objective may be something more fundamental. Freedom of action. An adversary does not necessarily need to destroy our capability if they can constrain our choices. They do not necessarily need to defeat an alliance if they can determine how it responds. They do not necessarily need to control our institutions if they can constrain their ability to decide, coordinate or act. They do not necessarily need to occupy territory if they can influence the decisions that determine what happens in that territory.
This suggests a different way of thinking about the strategic purpose of deterrence. The purpose of deterrence is not simply to prevent an adversary from doing X. It is to preserve our ability to decide what we do next. That is strategic agency. A resilient system is not necessarily one that returns to exactly what it was before disruption. A capable system is not necessarily one that possesses every possible capability. A coherent system is not one in which everyone agrees. It is one that can continue to make choices under pressure. And that may be the most useful way to think about good deterrence. Not whether nothing happened. Not whether every vulnerability disappeared. But whether, when pressure was applied, the system retained the ability to decide its own trajectory. Because the ultimate test of deterrence may not be whether we can stop an adversary from acting. It may be whether, when they act, we remain capable of deciding what happens next.
Conclusion:
Deterrence starts from within. It starts from us. Before we ask whether we can influence an adversary, we should ask whether we have organised ourselves sufficiently well to withstand their attempts to influence us. A system that cannot maintain its own coherence under pressure cannot credibly promise to impose coherent strategic costs on someone else.
Space → Time → System → Performance → Agency
Selected references
Maszczynska, M. (2026a) ‘Multi-Domain Deterrence: Coherence Under Pressure’, Deterrence Center. Available at: https://www.deterrencecenter.com/publications/multi-domain-deterrence-coherence-under-pressure
Maszczynska, M. (2026b) ‘Organising Power for Modern Deterrence: From Capability to Strategic Effect’, Deterrence Center, 27 July. Available at: https://www.deterrencecenter.com/briefings/organising-power-for-modern-deterrence.-from-capability-to-strategic-effect.-