Soaring prices for crude oil, falling production surpluses, wild speculation in commodities, a rush into the precious metals, turmoil in the Middle East, assertive oil producers: it is 1973-74 all over again, and at dictation speed.
Suicidal violence is not the exclusive property of the Muslim world. Suicide bombings were a tactic of nationalist struggles in 19th-century Europe and Russia, the far east during the second world war and the Vietnam war, and in modern Sri Lanka.
The aircraft that blew up the World Trade Center in New York and the Pentagon in Washington conveyed several messages to the world, of which one of the least remarked is this: the Muslims of the world are suffering.
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.
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 world dominion of western thought, forms of organisation, technology and military force is not God-given, nor eternal, nor greatly appreciated by the rest of the world.
There are about 15 million Muslims in the EU. They face ignorance, insult and even persecution. They cannot be wished away. To impose Enlightenment freedoms is self-defeating. Anyway, the Muslims have their own enlightenment.
There are signs that the age of petroleum has passed its zenith. Adjusted for inflation, a barrel of crude oil now sells for three times its long-run average. The large western oil companies, which cartellised the industry for much of the 20th century, are now selling more oil than they find, and are thus in the throes of liquidation.
Up until the Depression, recession had a moral character: it was supposed to purge the body economic of the greed and excess that attends a business expansion.