I was listening to my library of music, and I stumbled upon Neil Young - War of Man. Now, I looked up the lyrics (which I won’t post for copywriting reasons) and they seem to fit perfectly with the whole ‘WWIII’ mentality. I’m against any military action until other options have been studied or tried, and this just seems to fit 
Any others?
Some time ago a crazy dream came to me,
I dreamt I was walkin’ into World War Three,
I went to the doctor the very next day
To see what kinda words he could say.
He said it was a bad dream.
I wouldn’t worry 'bout it none, though,
They were my own dreams and they’re only in my head.
A nice little snippet from a very cool Bob Dylan tune. http://www.slopbucket.com/bob/lyrics/2talkin.html
Another one that comes to mind is Robert Hunter’s “A glass of wine at the end of time”. Can’t find any links to it, if I do I’ll let you know.
The other Dylan song that pops into my head is “Blowin in the wind”…great stuff
“War”, I believe sung by the Temptations. Lyrics are here:
http://www.angelfire.com/la/tempts1/war.html
Beginning lines:
“War, huh. What is it good for? Nothing.
Hmmm
What is it good for?
Absolutely (nothing.) Say it again.”