Some powerful images.
I'm a little disappointed Dada was omitted as it was a reaction by some intellectuals in Switzerland to the absurdity and destruction of modern warfare. It's often seen as obtuse and stupid, for lack of a better word, but it had a goal even if that goal was ostensibly nonsense.
http://en.wikipedia.org/wiki/Dada
Side note: They did include some Futurists who were very gung ho about modernity, including its form of war. Most of them died in the war.