For those who are interested, a good book on the history of opposition to war is:

http://www.amazon.com/We-Who-Dared-Say-War/dp/1568583850

It was written by a leftist and libertarian/paleoconservative working together, so you will likely find something you love and something you hate in it, as with all good books.

I very much regret my early support for the Iraq war.