“The distance at which it can strike, and the destructive power of such a quasi-intelligent machine being for all practical purposes unlimited, the gun, the armor of the battleship and the wall of the fortress, lose their import and significance. One can prophesy with a Daniel's confidence that skilled electricians will settle the battles of the near future. But this is the least. In its effect upon war and peace, electricity offers still much greater and more wonderful possibilities. To stop war by the perfection of engines of destruction alone, might consume centuries and centuries. Other means must be employed to hasten the end.”

"Strike Against War", speech in Carnegie Hall (5 January 1916) http://www.historyisaweapon.com/defcon1/helenstrike.html
Context: Strike against war, for without you no battles can be fought. Strike against manufacturing shrapnel and gas bombs and all other tools of murder. Strike against preparedness that means death and misery to millions of human beings. Be not dumb, obedient slaves in an army of destruction. Be heroes in an army of construction.

Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book X, Chapter I, Sec. 3

The Future of Civilization (1938)

Address to the Senate (22 January 1917)
1910s
Context: The question upon which the whole future peace and policy of the world depends is this: Is the present war a struggle for a just and secure peace, or only for a new balance of power? If it be only a struggle for a new balance of power, who will guarantee, who can guarantee, the stable equilibrium of the new arrangement? Only a tranquil Europe can be a stable Europe. There must be, not a balance of power, but a community of power; not organized rivalries, but an organized common peace.

Opening Keynote Address at NGO Forum on Women, Beijing China (1995)

"Father Severyan", in November 1916: The Red Wheel: Knot II (1984; translation 1999).
Context: At no time has the world been without war. Not in seven or ten or twenty thousand years. Neither the wisest of leaders, nor the noblest of kings, nor yet the Church — none of them has been able to stop it. And don't succumb to the facile belief that wars will be stopped by hotheaded socialists. Or that rational and just wars can be sorted out from the rest. There will always be thousands of thousands to whom even such a war will be senseless and unjustified. Quite simply, no state can live without war, that is one of the state's essential functions. … War is the price we pay for living in a state. Before you can abolish war you will have to abolish all states. But that is unthinkable until the propensity to violence and evil is rooted out of human beings. The state was created to protect us from evil. In ordinary life thousands of bad impulses, from a thousand foci of evil, move chaotically, randomly, against the vulnerable. The state is called upon to check these impulses — but it generates others of its own, still more powerful, and this time one-directional. At times it throws them all in a single direction — and that is war.

Sens-plastique

As quoted in "Kim Jong Un Defends Nuclear Tests, Says 'powerful Weapons' Help Mitigate Threats" in Republic World https://www.republicworld.com/world-news/rest-of-the-world-news/kim-jong-un-defends-nuclear-tests-says-powerful-weapons-help-mitigate-threats-articleshow.html (28 March 2022)