The 10-reel anti-war movie Civilization was released on June 2, 1916. Some scenes were filmed on California's Santa Catalina Island.
A submarine captain refuses an order to torpedo a defenseless passenger ship and is killed by his crew. He is reincarnated as Christ who visits world leaders and asks them to end the war (World War I).
*Good news! This movie is available on Youtube: https://www.youtube.com/watch?v=UwU035gIGO8