translation.en: Although we don't have statistics for warfare throughout the Middle Ages to modern times, we know just from conventional history -- the evidence was under our nose all along that there has been a reduction in socially sanctioned forms of violence.
translation.zh: 尽管我们没有从中世纪到现代的 所有战争数据 我们仅仅依据现有历史— 人类社会所支持的暴力行为一直在减少 这样的证据一直近在眼前