By Julian Borger

Foreign secretary argues west cannot kill its way out of the threats it faces

The foreign secretary, David Miliband, today argues that the use of the "war on terror" as a western rallying cry since the September 11 attacks has been a mistake that may have caused "more harm than good".

In an article in today's Guardian, five days before the Bush administration leaves the White House, Miliband delivers a comprehensive critique of its defining mission, saying the war on terror was misconceived and that the west cannot "kill its way" out of the threats it faces.

British officials quietly stopped using the phrase "war on terror" in 2006, but this is the first time it has been comprehensively discarded in the most outspoken remarks on US counterterrorism strategy to date by a British minister.

In remarks that were also made in a speech today in Mumbai, in one of the hotels that was a target of terrorist attacks in November, the foreign secretary says the concept of a war on terror is "misleading and mistaken".

"Historians will judge whether it has done more harm than good," Miliband says, adding that, in his opinion, the whole strategy has been dangerously counterproductive, helping otherwise disparate groups find common cause against the west.

"The more we lump terrorist groups together and draw the battle lines as a simple binary struggle between moderates and extremists or good and evil, the more we play into the hands of those seeking to unify groups with little in common," Miliband argues, in a clear reference to the signature rhetoric of the Bush era. "We should expose their claim to a compelling and overarching explanation and narrative as the lie that it is."

"Terrorism is a deadly tactic, not an institution or an ideology," he says.

He argues that "the war on terror implied a belief that the correct response to the terrorist threat was primarily a military one - to track down and kill a hardcore of extremists". But he quotes an American commander, General David Petraeus, saying the western coalition in Iraq "could not kill its way out of the problems of insurgency and civil strife".

Instead of trying to build western solidarity against a shared enemy, Miliband argues it should be constructed instead on the "idea of who we are and the values we share".

He goes on to say that "democracies must respond to terrorism by championing the rule of law, not subordinating. It is an argument he links directly with the Guantánamo Bay detention camp. "That is surely the lesson of Guantánamo and it is why we welcome president-elect Obama's clear commitment to close it."

After the al-Qaida attacks of 11 September 2001, the Bush administration presented the threat of a global terrorist onslaught as justification for pre-emptive military action, long-term detention without trial and severe interrogation techniques widely denounced by human rights groups as torture. The incoming Obama administration is expected to avoid using the term "war on terror" and adopt a more multilateral and less military-focused approach to global threats.

British officials are signalling, in increasingly public ways, that they cannot wait for the new team to take office next Tuesday, and wave goodbye to an eight-year administration with which they felt increasingly ill at ease, particularly following the departure of Tony Blair in 2007.

Miliband said last night that the incoming administration's proposed use of "smart power" meshed with his arguments. "The new administration has a set of values that fit very well with the values and priorities I am talking about," he said during a visit to Amethi, northern India.

Asked whether he had not left it late in the Bush era to make his criticism, the foreign secretary said British officials had stopped thinking in terms of a single war on terror more than two years ago, and had been putting a "more comprehensive approach" into practice.

British officials said the timing of the speech was dictated more by the Mumbai attacks than Bush's departure, but added that the transition in Washington meant the language could be less cautious than it might otherwise have been.

UK-US relations have been particular sour in recent days after Washington reneged on a pledge to back a largely British-drafted UN resolution calling for a ceasefire in Gaza. The White House over-ruled US diplomats after a demand from the Israeli prime minister, Ehud Olmert.