"To answer the last of these questions first - of course there were wars and crime. Has there ever been a society statist or otherwise - without war and crime? But Irish wars were almost never on the scale known among other civilized* European peoples. Without the coercive apparatus of the State which can through taxation and conscription mobilize large amounts of arms and manpower, the Irish were unable to sustain any large scale military force in the field for any length of time. Irish wars, until the last phase of the English conquest in the 16th and 17th centuries, were pitiful brawls and cattle raids by European standards.
The contemporary Irish historian, Kathleen Hughes, has remarked that one reason why the English conquest, begun in the 12th century under Henry II and completed only under William III in the late 17th century, was so long in being achieved was the lack of a well organized State in Celtic Ireland.
A people not habituated to a Statist conception of authority are incapable of considering a defeat in war as anything more than a temporary limitations upon their liberty. Submission to the enemy is viewed as no more than a necessary and temporary expedient to preserve one’s life until opportunity for revolt and recovery of liberty presents itself. The English, of course, considered the Irish notorious in their faithlessness (they repeatedly repudiated oaths of submission and allegiance to their English conquerors); they were repeatedly characterized by English commentators as natural-born, incorrigible rebels, barbarians, savages who refused to submit to the kind of law and order offered by the English State. The Irish, unfettered by the slave mentality of people accustomed to the tyranny of the State, simply refused to surrender their liberty and libertarian ways."
— Joseph R. Peden, Stateless Societies: Ireland (lasted 1,000 years)