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Co-wrote the screenplay for Citizen Kane (1941) with Orson Welles, sharing the Academy Award for Best Original Screenplay for a film routinely ranked among the greatest ever made. Before Hollywood he worked as a Berlin correspondent and one of The New Yorker's first drama critics, and he went on to write or doctor dozens of films, including The Wizard of Oz and Dinner at Eight, often without credit. Gary Oldman played him in the 2020 film Mank.