The criminologist Manuel Eisner scoured all of the historical records across Europe for homicide rates in any village, hamlet, town, county that he could find, and he supplemented them with national data, when nations started keeping statistics.
Kriminolog Manuel Eisner pretražio je sve povijesne zapise diljem Europe, tražeći stope ubojstva u svim selima, zaseocima, gradovima i okruzima koje je mogao naći i nadopunio ih je podacima na nacionalnoj razini od vremena kad su se počele voditi.