In the last 40 years of Queen Victoria's rule there were tens of millions of deaths from man made (trade policy led) famines in India. The numbers are disputed and sometimes the timeframe slips to 1880-1920, but I am confident that over 15 million Indians (that is pre-partition India - The Raj) died of starvation and disease directly caused by the actions of imperial administrators. That is from one part of the British Empire over just a few decades.