Gerard Baker at the Times Online lays out the catastrophe that war with Iran would be for the world:
Those who say war is unthinkable are right. Military strikes, even limited, targeted and accurate ones, will have devastating consequences for the region and for the world. They will, quite probably entrench and harden the Iranian regime. Even the young, hopeful democrats who despise their theocratic rulers and crave the freedoms of the West will pause at the sight of their country burnt and humiliated by the infidels.
A war, even a limited one, will almost certainly raise oil prices to recession-inducing levels, as Iran cuts itself off from global markets. The loss of Iranian supply and the already stretched nature of production in the Arab world and elsewhere means prices of $150 per barrel are easily imaginable. Military strikes will foster more violence in the Middle East, strengthen the insurgency in Iraq and Afghanistan, fuel anti-Western sentiment among Muslims everywhere and encourage more terrorism against us at home.
He then says this:
But multiplied together, squared, and then cubed, the weight of these arguments does not come close to matching the case for us to stop, by whatever means may be necessary, Iran from becoming a nuclear power. If Iran gets safely and unmolested to nuclear status, it will be a threshold moment in the history of the world, up there with the Bolshevik Revolution and the coming of Hitler. What the country itself may do with those weapons, given its pledges, its recent history and its strategic objectives with regard to the US, Israel and their allies, is well known. We can reasonably assume that the refusal of the current Iranian leadership to accept the Holocaust as historical fact is simply a recognition of their own plans to redefine the notion as soon as they get a chance ("Now this is what we call a holocaust"). But this threat is only, incredibly, a relatively small part of the problem.
If Iran goes nuclear, it will demonstrate conclusively that even the world's greatest superpower, unrivalled militarily, under a leadership of proven willingness to take bold military steps, could not stop a country as destabilising as Iran from achieving its nuclear ambitions.
No country in a region that is so riven by religious and ethnic hatreds will feel safe from the new regional superpower. No country in the region will be confident that the US and its allies will be able or willing to protect them from a nuclear strike by Iran. Nor will any regional power fear that the US and its allies will act to prevent them from emulating Iran. Say hello to a nuclear Syria, Egypt, Saudi Arabia.
Iran, of course, secure now behind its nuclear wall, will surely step up its campaign of terror around the world. It will become even more of a magnet and haven for terrorists. The terror training grounds of Afghanistan were always vulnerable if the West had the resolve. Protected by a nuclear-missile-owning state, Iranian camps will become impregnable.
And the kind of society we live in and cherish in the West, a long way from Tehran or Damascus, will change beyond recognition. We balk now at intrusive government measures to tap our phones or stop us saying incendiary things in mosques. Imagine how much more our freedoms will be curtailed if our governments fear we are just one telephone call or e-mail, one plane journey or truckload away from another Hiroshima.
Iran simply cannot be permitted to obtain nuclear weapons. As disastrous as war might be for the world, a nuclear Iran, as Baker eloquently argues, would be far worse. We must pray and hope that the Iranians can be persuaded to back down, but we must prepare for the eventuality that they won't.
Retired Major General Robert Scales discusses the military difficulties inherent in an Iraq-type war against Iran - and how he thinks an attack on Iran should be fought - in an editorial in the Washington Times here.