As Israel wages its just and justified war against the foot-soldiers, infrastructure and high command of Hamas, those of us far away from the battlefield have an important role to play. Even as soldiers fight the brutal frontline battle and generals craft strategy and diplomats plan for some semblance of peace, people like you and me—everyday people of goodwill and reason and faith, informed citizens, students and CEOs, teachers and preachers, scholars and writers, parents and grandparents—must engage another front: the battle of ideas.