The movie was adapted by Paul Osborn[?] from two novels -- Borden Deal[?]'s Dunbar's Cove and William Bradford Huie[?]'s Mud on the Stars. It was directed by Elia Kazan.
... designated anyone who assumed power for any period of time without a legitimate basis of authority. The first to have the title of "Tyrant" was Pisistratus in 560 BC. ...