sentences:  Warner's decision to sell came at a time when he was losing the formidable power that he once took for granted.He had already survived the dislocations of the 1950s, when other studio heads – including Louis B. Mayer, David O. Selznick, and Samuel Goldwyn – were pushed out by stockholders who "sought scapegoats for dwindling profits".Structural changes that occurred in the industry during this period ensured that studios would become "more important as backers of independent producers than as creators of their own films", a situation that left little room for the traditional movie mogul.