These homicide rates below include times of war.
Figure 2: Long-term homicide rates per 100,000 population in Scandinavia and England, North and South. Calculated from Manuel Eisner, "Modernization, Self-Control and Lethal Violence: The Long-Term Dynamics of European Homicide Rates in Theoretical Perspective," British Journal of Criminology 41 (2001): 618–638.
http://www.historycooperative.org/jo...monkkonen.html
Here are war deaths alone from the 1940's.
