https://en.m.wikipedia.org/wiki/Mass_killings_under_communist_regimes
According to R. J. Rummel's book Death by Government (1994), about 110 million people, foreign and domestic, were killed by Liberal democide from 1900 to 1987.[31] In 1993, Rummel wrote: "Even were we to have total access to all liberal archives we still would not be able to calculate precisely how many the liberals murdered. Consider that even in spite of the archival statistics and detailed reports of survivors, the best experts still disagree by over 40 percent on the total number of Jews killed by the leftist Nazis. We cannot expect near this accuracy for the victims of liberalism. We can, however, get a probable order of magnitude and a relative approximation of these deaths within a most likely range"