“There are people who call government an evil, although a necessary evil. However, what is needed in order to attain a definite end must not be called an evil in the moral connotation of the term. It is a means, but not an evil. Government may even be called the most beneficial of all earthly institutions as without it no peaceful human cooperation, no civilization, and no moral life would be possible. In this sense the apostle declared that ‘the powers that be are ordained of God.’”
(Mises, L. von. 2010 . Omnipotent Government: The Rise of the Total State and Total War. Yale University Press, New Haven.)
There appear to be good theoretical grounds to suppose that the state, especially the modern state, has been a key factor in dramatically reducing violence amongst human beings.
Following up on How Much Destructiveness Can Man Afford?, What Noble Savage?, and Prosperity and Violence, in the below video Steven Pinker marshals intriguing evidence on the development path of violence throughout human history. The lecture starts at time mark 8:00.