The price paid by humanity last century

Historian Daniel Jonah Goldhagen writes in his new book Worse than War: Genocide, Eliminationism, and the Ongoing Assault on Humanity:

The number of people who have been mass murdered [in the 20th century] is, conservatively estimated, 83 million. When purposeful famine is included, the number becomes 127 million, and if the higher estimates are correct the total number of victims of mass murder may be 175 million or more.