There is a well-supported theory called the Democratic Peace which holds that democracies DON'T make war on each other. To me this provides a strong justification on realist grounds for GWB's democratization project.
Even a good war is no fun, and what we can do to restrain it is a good thing.
So, lets hear it for Democracy! And if you need some more pro-democracy boosting or more theory on this then go here.