Carl, During the twentieth Century there were probably 150 Million UNARMED people, both children and adults killed by their governments. Stalin's Russia and Mao's China between them I think massed about 130 Million.
Then there were the small time killers. With 100 Thousand here and there, a couple million in Cambodia, same in Viet Nam. Pretty soon you get that 150.
That doesn't count ant fetuses. If you want to add them, you go well over 200 Million.