Found this via BoingBoing, where they are reposting some of their greatest hits:
http://www.nytimes.com/2003/05/03/arts/did-knives-forks-cut-murders-counting-backward-historians-resurrect-crime.html
Did Knives and Forks Cut Murders?; Counting Backward, Historians Resurrect Crime Statistics And Find the Middle Ages More Violent Than Now
By ALEXANDER STILLE
Published: May 3, 2003
In 1939, at one of civilization's lowest points, a little-known Swiss sociologist, Norbert Elias, published a book called ''Über den Prozess der Zivilisation'' (''On the Civilizing Process'') with a strange and unlikely thesis: that the gradual introduction of courtly manners -- from eating with a knife and fork and using a handkerchief to not spitting or urinating in public -- had played a major part in transforming a violent medieval society into a more peaceful modern one.....
......''The Elias theory got revived through the statistical approach to history,'' said Elizabeth Cohen, a historian at York University in Toronto who has written extensively on crime in Renaissance Italy.
Although there were no national statistics centuries ago, some historians discovered that the archives of some English counties were intact back to the 13th century. So in the 1970's they began diligently counting indictments and comparing them with estimated population levels to get a rough idea of medieval and early modern crime rates. Historians in Continental Europe followed suit and came up with findings that yielded the same surprising result: that murder was much more common in the Middle Ages than it is now and that it dropped precipitately in the 17th, 18th and 19th centuries. Something very important changed in Western behavior and attitudes, and it stood much prevailing social theory on its head. ''It was very surprising because social theory told us that the opposite was supposed to happen: that crime was supposed to go up as family and community bonds in rural society broke up and industrialization and urbanization took hold,'' said Eric H. Monkkonen, a professor of history at the University of California at Los Angeles and the author of several works on the history of criminality. ''The notion that crime and cities go together made emotional sense, particularly in America, where at least recently crime is higher in cities.''
Some scholars argue that many of the prevailing theories about why crime rises and falls could be further upended as scholars use new computer models to estimate population figures for past eras more accurately. ''With modern computing we may end up with some very good estimates in the homicide rates in many nations right back to the 17th and 16th centuries,'' said Randall Roth, a historian at Ohio State University who has recalculated murder rates for the 15th and 16th centuries in many countries. ''The data we are getting doesn't line up with most theories of either liberals or conservatives about crime. The theory that crime is determined by deterrence and law enforcement, by income inequality, by a high proportion of young men in a population, by the availability of weapons, by cities, most of those theories end up being wrong.''.....