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Von Neumann was a trained chemical engineer. Although chemistry is usually remarked as the slightest of his credentials, he knew it and used it. This book includes the story of how he applied mathematics and chemistry to the development, delivery and control of explosive weapons - first chemical, and then nuclear.
Von Neumann's work on explosives is a common thread that runs through his work and pulls together many of his interests that - seen in isolation - seem amazingly disparate. His interests in computers, aerodynamics, parlour game theory and even meteorology were all rooted in or entrained by his fascination with explosive weapons. (For a thermonuclear weapon, for example, the weather is a delivery system for fallout.)
In 1938, von Neumann first became a consultant to the United States military, working at the Aberdeen proving grounds in Maryland. He began by improving the aim of very large guns with explosive shells. It was a surprisingly complicated business because it involved winds aloft, turbulent flow, impacts, and expanding shock fronts of explosive charges. It was on one of his frequent trips to Aberdeen that he encountered one of the University of Pennsylvania engineers working on ENIAC. Von Neumann was unsatisfied with the analog computers then used for weapons work, and plunged into the problem of improving the nascent digital machine. Ultimately he created a digital computer at the Institute for Advanced Studies in Princeton. His purpose in building this particular machine was to use it to complete the design of the hydrogen bomb.
After the war began, von Neumann was sent to England to study the damage inflicted by German bombs during the blitz. He noticed the German bombs were not completely effective because they buried themselves before exploding. Von Neumann used this insight to invent the "air burst" explosive. Thereafter, allied bombs worldwide were fused to go off before they hit the ground. The technique vastly improved their destructive power. Hiroshima was an air burst. At Nagasaki, the bomb was an implosion weapon characterized at Los Alamos as "von Neumann's bomb" because of the implosive detonator he helped develop for it.
MacRae evidently admires von Neumann's accomplishments as a weaponeer, and as a political advocate of weapons development, but he does not quite convey von Neumann's personal sophistication and sense of scientific inquiry.
For example, in developing the digital computer von Neumann talked to a number of neurobiologists. For the most part he believed what they told him and adapted whatever he found useful. His Silliman lectures, reprinted as his book on The Computer and The Brain, includes his credulous precis on the neurobiology of the early 1950s. But von Neumann also noticed and questioned something few neurophysiologists bother themselves about - then or now - which is the fact that the retinal cells of the eye look backward. They are pointed toward the back wall of the eye, and not out at the world. Perhaps these cells see there a thin film diffraction pattern, and not the literal visual picture our brain shows us as an image of the world. Also, in a book by the editor of The Economist, one might expect a bit more on von Neumanns contributions to economics.
Withal, it is difficult to understand why such a civilized, curious, well spoken, socially adroit and erudite man was so intrigued by explosives. To try to make sense of von Neumann you can also read several other books - there exists no single coherent biography. Find "von Neumann and Weiner," two half-biographies in one volume by Heims; The superb Prisoner's Dilemma, by Poundstone; and for historical context, the Rhodes books on the making of the Atomic and Hydrogen Bombs.
After von Neumann's death, his concepts of strategic games were highly elaborated at the RAND corporation, and ultimately became U.S. nuclear policy. MacRae touches on this legacy, but the best book on this great chunk of obscured American history is The Wizards of Armageddon, by Kaplan. It would be interesting to know if von Neumann's theory of parlour games was also used to formulate strategic policy for the Viet Nam disaster. It would not be surprising.
It's true my father never studied for a phd in economics; if you'd just served in world war 2, got a first in economics in Cambridge and been offered a job at The Economist, you'd probably not have seen any practical point in that either. ( If you want to go into who knows what about 21st C futures, internetworking,intangible assets and new economics, I'm sure we can link you to that at http://www.normanmacrae.com )
It may be that some of my father's admiration for Von Neumann also got blended with his world views. But Von Neumann's family -whom my father worked closely with - didn't want any of that blend diluted.
My father was aiming primarily to explain to everyone why Von Neumann was one of the 2 great mathematicians of the 20th century and what background great mathematicians grow up in. In trying to make that accessible to everyone, he clearly doesn't go into the depth of mathematics theory that might stimulate today's hundred greatest living mathematicians. Everyone else will probably find the mathematical content suitable for a biography which they want to learn from.
Moreover, Von Neumann was the first mathematician to insist that the subject's future lay mainly in teamwork facilitated by computing rather than individual mathematical power. Not every academic has understood that point the way Johy would have hoped.
chris macrae, wcbn007@easynet.co.uk Marketing Electronic Learning NETwork http://www.egroups.com/group/melnet2
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