I have seen estimates of the total cost in human lives because of Communism, placed at 200 million.
That may be high but every single one of them was a human being with hopes, fears, love and life. They breathed the same air as the rest of us. For some reason I tend to forget that when we throw around the numbers.
Rummel puts the numbers for the Communist regimes at around 140 million, if you look at the numbers for the Communist regimes at my link.