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.

When Gordon the Brown, in London in 1997, commissioned a great inquisition or survey of his new realm, the result was the so-called national asset register (NAR), which was immediately dubbed by the boomers of the UK Treasury "the modern Domesday Book".

We generally write best of what we ourselves have seen.

Bulls don't read. Bears read financial history. As markets fall to bits, the bears dust off the Dutch tulip mania of 1637, the Banque Royale of 1719-20, the railway speculation of the 1840s, the great crash of 1929.

Ever since the destruction of Baghdad by the Mongols in 1258, the Muslim world has been in slow decline relative to the west. With Napoleon's invasion of Egypt and the creeping British annexation of Muslim India, that decline took on a malign aspect.

One of the consequences of the Iranian revolution has been an explosion of history. A country once known only from British consular reports and intrepid travelogues is now awash with historical documents, letters, diaries, grainy video, weblogs and secret police files of questionable authenticity.

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