It was called "the war to end all wars." Causing the downfall of three major empires, and eclipsing all previous wars in its destruction, World War I changed the course of global history. And decades before television and sophisticated print advertising, it changed the way conflict was marketed to the American people. A new exhibit, Call to Action: American Posters in World War I, at the Davison Art Center, displays dramatic posters that recruited soldiers, celebrated shipbuilding, called women for war work and even urged homemakers to prepare alternative foods in support of the war effort. "The best illustrators of the day were…