Poetry and policy

If poetry precedes and then causes extreme violence, in the form of ethnic cleansing.(Zizek)
If poetry causes change at such magnitude and it could be given a humanist moral polarity.
Then poetry has a potential to create peace, and pacifist strategies.
As a corollary poetry can be a moving force for history and works as a subtle power over politics with more might than philosophy itself.
On the other hand perhaps another art form might be the driver for peace.