Ka cika wannan magana: A shekara ta 1945, Yarjejeniyar London ta Kotun Sojoji ta Duniya ta bayyana nau'ikan laifuka uku, ciki har da "laifukan da aka yi wa zaman lafiya". An fara amfani da wannan ma'anar a Finland don gurfanar da shugabancin siyasa a cikin
Shari'o'in da ke da alhakin yaki a Finland. Daga baya aka san ƙa'idodin da ke Nuremberg.