When World War II ended, and films could be seen across country borders again, there was a certain backlog of unseen movies. By the 1950s, the French cinema scholars began writing about a certain style that had emerged in movie making during the 1940s. They dubbed it film noir. There is a case to be made that it may not have become a codified genre had it not been for the glut of movies and the insatiable appetite of French audiences for American films. By seeing so many in concentrated quick succession, a list of shared characteristics became a tip sheet for films noir.