She certainly introduced it to the 20th century but Stalin, Mao and Hitler are the heavy hitters in the ranks.
Queen Vic and the Brits didnt murder Boers en masse, so we/she ‘introduced’ nothing.
And given that late 19thC America gave us the Sand Creek and Wounded Knee massacres and the overall appalling treatment of the Native American running parallel with equally appalling treatment of black America, I wouldnt settle myself down in that ivory tower too long if I were you.