Europe and North America, we are told, are less dependent on energy-intensive heavy industry than in the 1960s and 1970s. It seems we squeeze more GDP out of a barrel of oil than in those benighted days.

Osama bin Laden, the Saudi-born revolutionary who is believed by most Arab and Iranian observers to be the inspiration of the attacks in New York and Washington, is the best known of the Islamic militants to have emerged in the past 20 years and the least difficult to fathom.

Since the attack on the United States on September 11 2001, and the US retaliation in Afghanistan and Iraq, there must be few people who have not felt a twinge of nostalgia for the cold war.

Losing your capital is like losing your trousers. It is a real humiliation, and one not to be soon repeated.

Life without oil, in fact, would be so different that it is frightening to contemplate. We are addicted, and it is no comfortable addiction.

The use of refined petroleum as fuel, which began in the 1850s, freed hundreds of millions of people from the toil of centuries, gave hundreds of millions more a life of ease and plenty, and, by allowing great cities to feed themselves from every corner of the world, multiplied the population of the earth fivefold.

The rise to prominence of the Saudi novel in Arabic is the great man-bites-dog of recent world literature. Saudi Arabia is a country without a free press, where European styles and forms are distrusted and where the female half of the population became literate only in this generation.