There are causes worth dying for, but none worth killing for.

Never think that war, no matter how necessary, nor how justified, is not a crime.

What is evil? - Whatever springs from weakness.

All the war-propaganda, all the screaming and lies and hatred, comes invariably from people who are not fighting.

Never ascribe to malice that which can adequately be explained by incompetence.

Listen up - there's no war that will end all wars

There is a road from the eye to the heart that does not go through the intellect.

Ideas are far more powerful than guns. We don't let our people have guns. Why should we let them have ideas?

The earth provides enough to satisfy every man's needs, but not every man's greed

Brutality to an animal is cruelty to mankind - it is only the difference in the victim.

When anger rises, think of the consequences.

Heaven cannot brook two suns, nor earth two masters.

A person may cause evil to others not only by his actions but by his inaction, and in either case he is justly accountable to them for the injury.

Some people are contriving ways and means of making us collapse.

Either war is obsolete, or men are.

If the Nuremberg laws were applied, then every post-war American president would have been hanged.

Wars are poor chisels for carving out peaceful tomorrows.

Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.

From the happy expression on their faces you might have supposed that they welcomed the war. I have met with men who loved stamps, and stones, and snakes, but I could not imagine any man loving war.

Never in the field of human conflict was so much owed by so many to so few.

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.