It's a well done picture, but I'd like to try and answer that question of yours. "What is greater than peace?" I think life is greater. And for life to exist and develop and for those who are alive to feel alive peace, sadly, must not exist.
Peace is absence of motion and change. It's an ideal, a true and noble ideal, worth fighting for, but I do not believe it can be achieved in life.
I don't mean to be offensive, just sharing my thought and thinking maybe it's worth discussing.