In Mank, there’s a scene where screenwriter Herman J. Mankiewicz, played by Gary Oldman, awakens disoriented in a California mansion. He soon wanders out back to a film set, where he encounters two studio bigwigs. One of them is Louis B. Mayer, the co-founder of MGM. The other is Irving G. Thalberg, a producer who has his own Academy Award named after him. Thalberg has to explain to Mayer who “Mank” is, even though he co-wrote one of their movies (just as he co-wrote, or depending on who you ask, wrote Citizen Kane, often considered the greatest movie ever made).