At a festival intertwined with France's national identity, the tension of art, politics and commerce always looms.
In the 1920s and early 1930s, American journalists tended to put the ascendant fascists on a normal footing.
Two Italian scholars who fled fascism in the 1920s urgently warned that American democracy was vulnerable to the same gradual erosion as in Italy. Their message still rings true today.
How Hitler's Germany, fascist Italy and other authoritarian states tried to win friends and influence people.