Best Anti War Song ?
 

My vote

Human League - The Lebanon

War, good God, what is it good for? Absolutely nothing. Say it again.

Bob

Bob Dylan: Masters of War

There really should be no argument here : Bob Dylan : Blowin' In The Wind. It's the one song that will be just as familiar in a hundred years as it is today. It's almost hard to believe that there was a time not that long ago when the song didn't exist.

Eve of Destruction by Barry McGuire

rings true today as it did in 1965.

War Pigs - Black Sabbath

That would be my answer too.

"Disposable Heroes" - Metallica

What's Going On

Imagine - John Lennon

BYOB - System of A Down

Wasted Life - Stiff Little Fingers

buffalo springfield - for what its worth

I'll throw in "And The Band Played Waltzing Matilda". Written by Eric Bogle but (IMO) best recorded by The Pogues

Don't know if it's the best, but I do love that song. Another decent OZ antiwar song was 'I Was Only Nineteen (A Walk In The Light Green)' (nam).

One of my favorites was 'I'm Your Flag' by the English Beat.

I always considered Blowin in the Wind to be more of a protest song w/pacifist overtones, whereas Masters Of War was like an old testament thunderbolt and therefore my "best" anti-war song.

My favorites:

Gods of War – Bruce Dickinson
The Call Up – The Clash
Zombie – Cranberries
2 Minutes to Midnight - Iron Maiden
Afraid to Shoot Strangers - Iron Maiden

* Iron Maiden has a lot of great songs about war, but they are not necessarily anti-war (nor pro-war, just about war).

CCR-Run Through The Jungle

Fortunate Son - CCR and covered wonderfully by pearl jam

Jackopierce - March
Don McLean - The Grave (the original version, not the George Michael cover)

Many good songs, but this is what sprang immediately to mind:

I-Feel-Like-I'm-Fixin'-To-Die Rag - Country Joe and the Fish

Viet Nam by Jimmy Cliff
Shipbuilding by Elvis Costello

There's a couple of good anti-war songs on the latest Machine Head album:
Clenching the Fists of Dissent
A Farewell to Arms

I forgot about...

Rust In Peace - Megadeth

John Mayer - Waiting for the world to change.

Edit: Another one I just thought of - Billy Joel / Michael Cavanaugh - Goodnight Saigon.

Belle And Sebastian - I Fought In A War
Metallica - One