“Libertarians have always battled the age-old scourge of war. They understood that war brought death and destruction on a grand scale, disrupted family and economic life, and put more power in the hands of the ruling class — which might explain why the rulers did not always share the popular sentiment for peace. Free men and women, of course, have often had to defend their own societies against foreign threats; but throughout history, war has usually been the common enemy of peaceful, productive people on all sides of the conflict.”

Source: Drenai series, The Swords of Night and Day, Ch. 11
Context: We are closest to life when we are vying with death... The blood runs hot, the air smells sweet, the sky becomes an unbearably beautiful blue. Battle is intoxicating. That is why the ghastly vileness of war has always been so popular.

Source: Songs of the Soul (1971)
Context: War forgets peace. Peace forgives war. War is the death of the life human. Peace is the birth of the Life Divine. Our vital passions want war. Our psychic emotions desire peace.

Foreword (1984) to The Market for Liberty (1970)

The Future of Civilization (1938)

Dorothy Thompson’s Political Guide: A Study of American Liberalism and its Relationship to Modern Totalitarian States (1938)
Source: A Study of American Liberalism and its Relationship to Modern Totalitarian States (1938)
p. 33

The Canton, Ohio Speech, Anti-War Speech (1918)
Context: Wars throughout history have been waged for conquest and plunder. In the Middle Ages when the feudal lords who inhabited the castles whose towers may still be seen along the Rhine concluded to enlarge their domains, to increase their power, their prestige and their wealth they declared war upon one another. But they themselves did not go to war any more than the modern feudal lords, the barons of Wall Street go to war. The feudal barons of the Middle Ages, the economic predecessors of the capitalists of our day, declared all wars. And their miserable serfs fought all the battles. The poor, ignorant serfs had been taught to revere their masters; to believe that when their masters declared war upon one another, it was their patriotic duty to fall upon one another and to cut one another's throats for the profit and glory of the lords and barons who held them in contempt. And that is war in a nutshell. The master class has always declared the wars; the subject class has always fought the battles. The master class has had all to gain and nothing to lose, while the subject class has had nothing to gain and all to lose — especially their lives.
They have always taught and trained you to believe it to be your patriotic duty to go to war and to have yourselves slaughtered at their command. But in all the history of the world you, the people, have never had a voice in declaring war, and strange as it certainly appears, no war by any nation in any age has ever been declared by the people.
And here let me emphasize the fact — and it cannot be repeated too often — that the working class who fight all the battles, the working class who make the supreme sacrifices, the working class who freely shed their blood and furnish the corpses, have never yet had a voice in either declaring war or making peace. It is the ruling class that invariably does both. They alone declare war and they alone make peace.
Yours not to reason why;
Yours but to do and die.
That is their motto and we object on the part of the awakening workers of this nation.
If war is right let it be declared by the people. You who have your lives to lose, you certainly above all others have the right to decide the momentous issue of war or peace.

Speech to the conference of representatives of the British and Dominion Labour parties, Westminster, London (12 September 1944), quoted in The Times (13 September 1944), p. 8.
War Cabinet

A remark to his private secretary, Lord Sandon, in May 1919. From Terence H. O'Brien, Milner, Viscount Milner of St James and Cape Town 1954-1925, 1979, Constable, p. 335.

The Causes of War (1973)