That's debatable. The state was the #1 killer of the 20th century. We think that we need government protection, but if government is the #1 killer, I'm not sure we wouldn't be better off without it.
I have a hard time believing that the the aggregate number of premature deaths caused by government (and/or Man) (war, Holocaust, pogroms) in the 20th Century is higher than the number of premature deaths caused by nature (disease, natural disaster). In fact, seeing that in 1998, 7.3M individuals died from heart disease, I would infer that heart disease alone is responsible for more deaths in the Twentieth Century than Man (then, add the Influenze Pandemic of 1918 and Man is not even close).