With his friend & political mentor, writer Rob Wagner
Wagner was the editor of Script Magazine, a New Yorker-style publication out of Los Angeles, which Charlie contributed to on a number of occasions. He served as ghostwriter for Chaplin as well as press representative. He also made a brief appearance in the dance hall sequence of A Dog's Life (1918). It was most likely through Wagner that Charlie met two other intellectuals who helped shape his political viewpoint: Upton Sinclair and Max Eastman.