The practice of violence, like all action, changes the world, but the most probable change is a more violent world.

Arendt (1906-1975) was a German-Jewish political theorist and philosopher. (From 'The Anti-War Quote Book,' Quirk Books, Ed. by Eric Groves Sr.)

The chief qualification of a mass leader has become unending infallibility; he can never admit an error.

Although tyranny...may successfully rule over foreign peoples, it can stay in power only if it destroys first of all the national institutions of its own people.

War is a bankruptcy of policy

Van Seeckt was German military officer who lived from 1866-1936. (quote from 'The Anti-War Quote Book,' edited Eric Groves, Sr., pub. Quirk Books, 2008)

War is the most striking instance of the failure of intelligence to master the problem of human relationships.

The tragedy of war is that it uses man’s best to do man’s worst.

I hate war...for the dictatorships it puts in the place of democracies, and for the starvation that stalks after it.

I hate war for its consequences, for the lies it lives on and propagates, for the undying hatreds it arouses...

The responsibility of the great states is to serve, and not to dominate, the world.

Truman (1884-1972) was president of the United States. (quote from 'The Anti-War Quote Book,' edited Eric Groves, Sr., pub. Quirk Books, 2008)

Mankind is becoming a single unit, and that for a unit to fight against itself is suicide.

Be not dumb, obedient slaves in an army of destruction! Be heroes in an army of construction!

Strike against war, for without you no battles can be fought!

War brings out the most negative emotional human responses on both sides.

Emphasis on military prowess is an indication of philosophical poverty.

Two armies that fight each other is like one large army that commits suicide.

from his book "Under Fire: The Story of a Squad" (1916). Barbusse lived from 1873-1935.

There is nothing that war has ever achieved that we could not better achieve without it.

It's not a matter of what is true that counts but a matter of what is perceived to be true.

What political leaders decide, intelligence services tend to seek to justify.

from page 303 of his book, "Diplomacy"

It is for us to refuse loyalty when injustice holds sway.

from "The Philosopher's Stone"

Old men declare war. But it is the youth that must fight and die.

It is the youth who must inherit the tribulation, the sorrow...that are the aftermath of war.

A visitor from Mars could easily pick out the civilized nations. They have the best implements of war.

The people can always be brought to the bidding of the leaders...tell them they are being attacked, and denounce the peacemakers for lack of patriotism and exposing the country to danger.

Every politician in the world is all for revolution, reason, and disarmament--but only in enemy countries, not in his own.

Hesse (1877-1962) was a philosophical writer, best known for his work "Siddartha."

In peace, sons bury their fathers; in war, fathers bury their sons.