25 years after 9/11, we’re still fighting the last war

The title of this essay — "25 years after 9/11, we're still fighting the last war" — captures a dilemma as old as military strategy itself. Institutions, like individuals, tend to prepare for the conflict they survived, not the one approaching. The source article at The Hill (https://thehill.com/opinion/national-security/6075045-evaluating-twenty-five-years-post-911/) makes a pointed observation: an institution that stops updating its threat model is effectively preparing to be surprised. There is real merit to this argument. The counterterrorism apparatus built over the past quarter-century — from special operations forces to surveillance programs — was calibrated for a specific adversary at a specific moment. Meanwhile, the threat landscape has shifted dramatically. Great-power rivalry is back on the agenda in a way not seen since the Cold War. Cybersecurity breaches strike civilian infrastructure. Artificial intelligence is changing the character of conflict in ways that legacy bureaucracies struggle to track. If the Pentagon and intelligence community remain optimized for counterinsurgency and counterterrorism, they may find themselves organizationally incapable of responding to threats that do not fit the old template. However, fairness demands acknowledging the other side. The threat from militant extremism has not vanished; it has metastasized. Groups like ISIS-K continue to demonstrate operational capability, and domestic radicalization remains a distinct concern. Skeptics of the "new threat model" argument rightly warn against the pendulum swinging too far. The United States spent twenty years learning the painful lessons of counterterrorism — territorial wars, nation-building fatigue, and the limits of military power. Abandoning that institutional knowledge entirely would be its own form of strategic error. The wisest path, as the essay implies, is not replacement but integration: a threat model flexible enough to hold multiple dangers in view at once. What makes this conversation politically charged is that threat assessment is never purely analytical — it is also budgetary and bureaucratic. Every recommendation to shift resources toward great-power competition threatens constituencies, contractors, and career paths built around the post-9/11 consensus. The debate over "fighting the last war" is thus not merely academic; it is a contest over power within the national security state itself. For readers, the takeaway is clear: the next enemy will not announce itself in the same costume as the last one, and the institutions that prepare for yesterday's fight are already disadvantaged for tomorrow's.