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.
犯罪学家Manuel Eisner 整理了欧洲的所有历史记录 涉及他能找到的乡、村、镇、县的凶杀率 然后综合了有数据记录以来的 所有国家数据