I didn't mean to hijack the discussion. I agree that Imperial Japan, Maoist China and Soviet Russia killed tens of millions of people, and Europe/United States had similar number of deaths in World War 1 and 2. I know there is terrible atrocities taking place right now all over the world. From the ethno-religious concentration camps, to human trafficking and slavery, forced prison labor etc.
My comment was in context of the 75th anniversary of the Hiroshima and Nagasaki bombings and nuclear war, and how, as the United States enters into what many are calling Cold War 2, we should learn the lessons from the first Cold War and the realities of nuclear war.
These major anniversaries provide a lot of news stories for all of humanity to take a moment to pause and reflect on.