Austrian-American psychiatrist, psychosociologist, and educator (1889-1974) who was the founder of psychodrama and the foremost pioneer of group psychotherapy. Pencil signature in German (translated), "Greetings from Montreal, Moreno, I.IX.26," on the reverse of an off-white 5.5 x 3.5 postcard. Moreno adds the address in his own hand. Matted with a modern glossy photo to an overall size of 8.25 x 11.75. In fine condition.