The October 7th Hamas terrorist attack did more than expose a catastrophic intelligence failure. It exposed the limits of deterrence as a governing strategy. For years, Israel relied on deterrence and interception to manage threats from Hamas in Gaza and Hezbollah in Lebanon. Defensive systems such as Iron Dome reduced casualties and preserved domestic stability. But they also allowed attacks to continue without eliminating the forces behind them. That framework no longer holds.
Israel has now begun to shift from deterrence to denial. The distinction matters. Deterrence seeks to influence an adversary’s behavior by raising the cost of action. It assumes that the adversary will calculate those costs and choose restraint. Denial operates differently. It seeks to remove the adversary’s ability to act in the first place. Deterrence manages threats. Denial attempts to eliminate them.
For years, Israel’s approach to Hamas reflected deterrence. Periodic conflicts would erupt, followed by ceasefires that restored a temporary calm. Israeli officials often described this cycle as “mowing the grass”—a series of limited operations designed to degrade Hamas’s capabilities without attempting to destroy the organization. The assumption behind this strategy was that escalation could be controlled and contained.
October 7th shattered that assumption. Hamas demonstrated the ability to plan and execute a large-scale, coordinated attack that overwhelmed defensive systems and exploited the very predictability of Israel’s deterrence-based posture. A strategy built on managing escalation cannot hold when an adversary prepares for a decisive escalation of its own.
Israel’s operations in Gaza now reflect a different objective. Rather than signaling restraint or restoring quiet, Israeli forces have targeted Hamas infrastructure, command networks, and tunnel systems with the aim of reducing the organization’s ability to operate altogether. This is not a temporary degradation campaign. It is an attempt to dismantle capacity.
The same shift is visible in Israel’s posture toward Hezbollah in Lebanon. For years, Hezbollah operated under a tacit understanding: it could build up its arsenal and maintain a forward presence near Israel’s border, so long as it avoided triggering full-scale war. That understanding allowed Hezbollah to expand dramatically. Today, it possesses an estimated arsenal of over 100,000 rockets and missiles, many capable of striking deep into Israeli territory.
Recent Israeli actions suggest a change in approach. Rather than relying solely on deterrence to prevent Hezbollah attacks, Israel has increasingly focused on restricting Hezbollah’s operational space. Strikes against infrastructure, weapons depots, and command elements aim not just to send a signal, but to physically degrade the organization’s ability to threaten Israeli territory. The objective is no longer simply to deter Hezbollah, but to constrain it.
This shift did not occur overnight. Deterrence did not collapse in a single moment; it eroded over time. Hezbollah’s arsenal expanded steadily after the 2006 war. Hamas evolved from a localized militant group into an organization capable of complex, multi-domain operations. Israeli defensive systems continued to intercept incoming fire with high success rates, but those successes masked a deeper problem: they did not reduce the underlying threat.
Reliance on interception created a structural paradox. Defensive systems lowered immediate harm and reduced political pressure for decisive action. Each round of conflict ended with a ceasefire that restored quiet while adversaries rebuilt and expanded their capabilities. Over time, this cycle increased the scale and intensity of future confrontations. What appeared to be stability was, in reality, a deferred escalation.
The challenge extends beyond Israel. Iran has built a network of proxy forces across the region, including Hezbollah in Lebanon and militias in Syria, Iraq, and Yemen. These groups operate with increasing coordination and access to advanced weapons systems, including precision-guided munitions and drones. They do not behave like traditional state actors, and they do not respond predictably to deterrence.
The 2019 attack on Saudi oil facilities at Abqaiq and Khurais illustrated this dynamic. Iranian-linked forces struck critical infrastructure, temporarily disrupting a significant portion of global oil supply. The attack demonstrated how quickly regional conflicts can produce global consequences—and how difficult it is to deter actors willing to accept risk and operate through deniable networks.
Geography compounds the problem. The Strait of Hormuz, through which roughly one-fifth of the world’s oil supply passes, remains a persistent vulnerability. Any disruption carries immediate economic consequences. In such an environment, deterrence alone cannot provide stability. Adversaries that operate through proxies and accept high levels of risk do not conform to the assumptions that deterrence requires.
Denial strategies offer a more direct response, but they introduce their own risks. Efforts to degrade an adversary’s capabilities require sustained operations, often across multiple domains. They can trigger escalation and draw in additional actors. They also raise difficult questions about what follows military success. Removing an adversary’s capability does not automatically produce political stability, and it does not resolve the underlying conditions that gave rise to the conflict.
Yet the alternative carries even greater danger. The past two decades have shown that defensive success can conceal strategic failure. When states absorb attacks without eliminating their source, adversaries gain time to expand their capabilities, refine their tactics, and prepare for more ambitious operations. Each cycle raises the cost of the next confrontation.
October 7th forced a reassessment of that tradeoff. Israeli policy now reflects a lower tolerance for strategies that absorb threats while allowing them to grow. The shift from deterrence to denial signals a judgment: containment no longer provides security under current conditions.
This shift has implications beyond Israel. Deterrence has shaped international security for decades, from nuclear doctrine to counterterrorism. But conflicts involving non-state actors and proxy networks challenge its assumptions. These actors operate across borders, rebuild quickly, and often accept levels of risk that traditional deterrence models cannot accommodate.
In these environments, states may increasingly turn to denial. Reducing an adversary’s capability offers a more direct path to security than attempting to influence behavior through signaling alone. That shift does not eliminate risk, but it changes the balance between immediate security and long-term stability.
October 7th did not create this problem; it exposed it completely. A strategy that manages threats without removing them cannot hold when adversaries prepare for escalation. Deterrence still has a role, but it no longer provides a sufficient foundation for security policy. As Robert Greene observes in The 48 Laws of Power, leaving even a single ember allows the fire to return.
