Quotulatiousness

March 5, 2013

David Friedman reviews The Birth of the West by Paul Collins

Filed under: Books, Europe, France, Germany, History, Media, Religion — Tags: , , , — Nicholas @ 10:21

David Friedman on the recent book The Birth of the West: Rome, Germany, France, and the Creation of Europe in the Tenth Century, by Paul Collins.

Take five or six soap operas set in central and western Europe in the 10th century. Chop in pieces, stir, and glue together more or less at random. You now have something reasonably close to the picture that emerges from The Birth of the West, 427 pages of 10-century history as presented by the Australian author and broadcaster Paul Collins. The reader is left wondering whether the chaos is a bug or a feature, a failure of the author to shape his material into a coherent story or a deliberate attempt to show the reader the chaos of the period.

[. . .]

The most interesting thing about the book may be what it implies about how much we do not know. Thus, for instance, Collins offers a lurid account of Theodora and Marizia, a mother and daughter heavily involved in papal politics. (Marizia was supposedly the mistress at age 14 of an 80-year-old pope.) He then mentions that his source was writing 50 years after the events he describes, that another source presents a much more attractive picture, and that both have axes to grind. But he goes on to treat the first account as accurate. He offers a glowing portrait of Theophano, a Byzantine princess who became the wife of Otto II and mother of Otto III, dismissing a much more critical picture from a contemporary source. A historian with a different set of biases could have given us an equally convincing version in which some of the good guys and bad guys switched hats.

[. . .]

Collins presents the conventional view of the dominant role of religion in medieval Europe, cites several books by the French medievalist Georges Duby, but not the one in which Duby argues that the picture is badly distorted by the fact that almost all of our sources are clerical. The point is relevant for modern sources as well: Collins himself spent much of his life as a Catholic priest before resigning over a dispute with the Vatican and taking up a second career as writer and broadcaster.

None of that means that the story he tells is wrong. The modern reader inclined to take any single historical view as gospel might consider how much disagreement there is on issues for which we have enormously better information — the Vietnam War, say, or the evaluation of controversial political figures such as FDR, Reagan, or Thatcher. It does not even mean that the book should have been written differently. The story Collins tells is confusing enough as is; it would be far more confusing if he had tried to keep all of the alternative narratives going at once. And, to his credit, while he tells a single story, he makes it clear that alternatives exist — almost all of my critical comments are based on information he himself presents. I would not recommend the book as light reading, but it does provide a vivid picture of the century.

March 27, 2011

Over-analyzing the Bayeux Tapestry

Filed under: France, History, Humour, Technology — Tags: — Nicholas @ 10:39

Chris Mellor looks at the Bayeux Tapestry from a data storage perspective:

The Bayeux Tapestry, the victor’s view of the events, was finished in 1077, ten years after it was begun, making it 934 years old. At 224.3ft long and 1.6ft wide the total surface area is 358.88sq ft.

Our understanding is that the Tapestry features 45 to 48 threads per inch which gives us a resolution approximating 47dpi with a colour depth of 8, ignoring later repairs. Thus, in information terms, the tapestry contains 2.429MB of information, assuming 1-bit per colour, 47dpi, and a 51,678.72 square inch surface area.

From the writing point of view it took ten years for English (Saxon) seamsters, seamstresses or embroiderers to write this 2.429MB of data, which must be some kind of record. Assuming an eight-hour, 350-day working period for these ten years, that implies a write bandwidth of 10.84 bytes/hour; a spectacularly slow data rate in information transfer terms.

What makes it worse is that there were multiple parallel write heads — seamsters or seamstresses — and we could envisage a team of five on average, meaning each write head in this theoretical Bayeux Tapestry archiving model wrote at a rate of 2.168 bytes/per hour (17.344 bits/min). A truly amazingly poor information write bandwidth from our IT viewpoint, but a blur of flickering needles and fingers seen from the embroiderers’ seat.

May 30, 2010

QotD: The first great back-to-the-land experiment

. . . the plundering, the lack of invention, the barbarians and above all Diocletian’s red tape did for Rome in the end. As the empire disintegrated under this bureaucratic burden, at least in the west, money lending at interest stopped and coins ceased to circulate so freely. In the Dark Ages that followed, because free trade became impossible, cities shrank, markets atrophied, merchants disappeared, literacy declined and — crudely speaking — once Goth, Hun and Vandal plundering had run its course, everybody had to go back to being self-sufficient again. Europe de-urbanised. Even Rome and Constantinople fell to a fraction of their former populations. Trade with Egypt and India largely dried up, especially once the Arabs took control of Alexandria, so that not only did oriental imports such as papyrus, spices and silk cease to appear, but those export-oriented plantations in Campania became the plots of subsistence farmers instead. In that sense, the decline of the Roman Empire turned consumer traders back into subsistence peasants. The Dark Ages were a massive experiment in the back-to-the-land hippy lifestyle (without the trust fund): you ground your own corn, sheared your own sheep, cured your own leather and cut your own wood. Any pathetic surplus you generated was confiscated to support a monk, or maybe you could occasionally sell something to buy a metal tool off a part-time blacksmith. Otherwise, subsistence replaced specialization.

Matt Ridley, The Rational Optimist: How Prosperity Evolves, p. 175

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