Peace on Earth from 1939

An anti-war car­toon from MGM, with the grand­fa­ther voiced by Mel Blanc. It was nom­i­nated for an Acad­emy Award for Short Sub­jects (Car­toons). More on its Wikipedia page.

Via Fredy Cham­pagne, of the VFP Golden Rule Project, which Friends Jour­nal pro­filed in August 2013.