As every single person here knows, the justification for the invasion of Iraq was that Saddam Hussein possessed a highly dangerous body of weapons of mass destruction, some of which could be fired in 45 minutes, bringing about appalling devastation. We were assured that was true. It was not true. We were told that Iraq had a relationship with Al Quaeda and shared responsibility for the atrocity in New York of September 11th 2001. We were assured that this was true. It was not true. We were told that Iraq threatened the security of the world. We were assured it was true. It was not true.

The truth is something entirely different. The truth is to do with how the United States understands its role in the world and how it chooses to embody it. But before I come back to the present I would like to look at the recent past, by which I mean United States foreign policy since the end of the Second World War. Direct invasion of a sovereign state has never in fact been America's favoured method. In the main, it has preferred what it has described as 'low intensity conflict'. Low intensity conflict means that thousands of people die but slower than if you dropped a bomb on them in one fell swoop. It means that you infect the heart of the country, that you establish a malignant growth and watch the gangrene bloom.

I put to you that the United States is without doubt the greatest show on the road. Brutal, indifferent, scornful and ruthless it maybe but it is also very clever. As a salesman it is out on its own and its most saleable commodity is self love. It's a winner Listen to all American presidents on television say the words, 'the American people', as in the sentence, 'I say to the American people it is time to pray and to defend the rights of the American people and I ask the American people to trust their president in the action he is about to take on behalf of the American people.'

It's a scintillating stratagem. Language is actually employed to keep thought at bay. The words 'the American people' provide a truly voluptuous cushion of reassurance. You don't need to think. Just lie back on the cushion. The cushion may be suffocating your intelligence and your critical faculties but it's very comfortable. This does not apply of course to the 40 million people living below the poverty line and the 2 million men and women imprisoned in the vast gulag of prisons, which extends across the US.

The United States no longer bothers about low intensity conflict. It no longer sees any point in being reticent or even devious. It puts its cards on the table without fear or favour. It quite simply doesn't give a damn about the United Nations, international law or critical dissent, which it regards as impotent and irrelevant. It also has its own bleating little lamb tagging behind it on a lead, the pathetic and supine Great Britain. What has happened to our moral sensibility? Do they refer to a term very rarely employed these days—conscience? A conscience to do not only with our own acts but to do with our shared responsibility in the acts of others? Is all this dead? Look at Guantanamo Bay. Hundreds of people detained without charge for over three years, with no legal representation or due process. At present many are on hunger strike, being force-fed, including British' residents. No niceties in these force-feeding procedures.

No sedative or anaesthetic. Just a tube stuck up your nose and into your throat. You vomit blood. This is torture. What has the British Foreign Secretary said about this? Nothing. What has the British Prime Minister said about this? Nothing. Why not? Because the United States has said: to criticise our conduct in Guantanamo Bay constitutes an unfriendly act. You're either with us or against us. So Blair shuts up. The invasion of Iraq was a bandit act, an act of blatant state terrorism, demonstrating absolute contempt for the concept of international law. The invasion was an arbitrary military action inspired by a series of lies upon lies and gross manipulation of the media and therefore of the public; an act intended to consolidate American military and economic control of the Middle East masquerading—as a last resort—all other justifications having failed to justify themselves—as liberation. A formidable assertion of military force responsible for the death and mutilation of thousands and thousands of innocent people.

How many people do you have to kill before you qualify to be described as a mass murderer and a war criminal? One hundred thousand? More than enough, I would have thought.

Therefore it is just that Bush and Blair be arraigned before the International Criminal Court of Justice. But Bush has been clever. He has not ratified the International Criminal Court of Justice.

Therefore if any American soldier or for that matter politician finds himself in the dock Bush has warned that he will send in the marines. But Tony Blair has ratified the Court and is therefore available for prosecution. We can let the Court have his address if they're interested. It is Number 10, Downing Street, London. Early in the invasion there was a photograph published on the front page of British newspapers of Tony Blair kissing the cheek of a little Iraqi boy. 'A grateful child,' said the caption. A few days later there was a story and photograph, on an inside page, of another four-year-old boy with no arms. His family had been blown up by a missile. He was the only survivor. 'When do I get my arms back?' he asked. The story was dropped. Well, Tony Blair wasn't holding him in his arms, nor the body of any other mutilated child, nor the body of any bloody corpse. Blood is dirty. It dirties your shirt and tie when you're making a sincere speech on television.

I know that President Bush has many extremely competent speech writers but I would like to volunteer for the job myself. I propose the following short address which he can make on television to the nation. I see him grave, hair carefully combed, serious, winning, sincere, often beguiling, sometimes employing a wry smile, curiously attractive, a man's man. 'God is good. God is great. God is good. My God is good. Bin Laden's God is bad. His is a bad God. Saddam's God was bad, except he didn't have one. He was a barbarian. We are not barbarians. We don't chop people's heads off. We believe in freedom. So does God. I am not a barbarian. I am the democratically elected leader of a freedom-loving democracy. We are a compassionate society. We give compassionate electrocution and compassionate lethal injection. We are a great nation. I am not a dictator. He is. I am not a barbarian. He is. And he is. They all are! I possess moral authority. You see this fist? This is my moral authority And don't you forget it.'

I believe that despite the enormous odds which exist, unflinching unswerving, fierce intellectual determination, as citizens, to define the real truth of our lives and our societies is a crucial obligation which devolves upon us all. It is in fact mandatory.