An essential idea in Viktor Frankl’s philosophy is that of one humanity: humanity only begins where the differences between people and groups end. In times of war, knowing this is more important than ever. We need voices like Viktor Frankl’s that make passionate calls for a fight for peace. His appeals—three texts written between 1949 and 1969, accompanied by further contributions—not only give hope for an early end to the war, but also provide a valuable incentive to rediscover the work of the Austrian psychologist.