War provides an outlet for national vengeance.
It satisifies the demands of fear.
It brings power to the victor.
It provides security to the homeland.
It opens an avenue for getting what you want by force.
By contrast, living in peace one breathes easily. There is space to allow for connections with other people. Arguments proceed with mutual respect for either side. Mahatma Gandhi, Nelson Mandela and Mother Teresa lived different aspects of peace. We learned from each that the way of peace can end suffering and oppression, not by warring against an enemy but by bearing witness to wrongs, and by allowing sympathy and common humanity to do their patient work. War smothers all of that.
— Deepak Chopra, Peace Is the Way