Friedrich Nietzsche left the University of Basel in 1879 as a result of ill health, and devoted himself to writing, producing most of the works for which he is famous, including Thus Spake Zarathustra, The Anti-Christian, The Genealogy of Morals, and Ecce Homo. He suffered a breakdown in Turin in 1889, probably as a result of an old syphilitic infection, and remained insane until his death in 1900. His unpublished works fell into the hands of his sister, the notorious anti-Semite Elisabeth Forster-Nietzsche, who edited and altered his works and who controlled access to his manuscripts. As a result of Elisabeth’s tampering, Nietzsche’s works gained a reputation that made him the intellectual darling of Imperial Germany and Hitler’s Third Reich.
Josephine “Sadie” Marcus left Tombstone in the aftermath of the Earp-Clanton feud and lived briefly with her family until she again encountered Wyatt Earp. Though there is no record that they ever married, Josie lived with Wyatt until his death. She died in 1944.
Virgil Earp was ambushed after the O.K. Corral fight by the Cowboy faction, as a result of which his arm was paralyzed. Despite the handicap he lived a full, adventurous life, and died in 1905.
Morgan Earp was ambushed in a Tombstone pool hall by the Cowboy faction, and died within hours. It is possible that his killers thought they were shooting Wyatt. His death prompted the Vengeance Ride by the Earp faction, in which their posse killed or drove the principal Cowboy leaders from Tombstone.
Curly Bill Brocius remained the leader of the Cowboy faction until he and his gang attempted to ambush Wyatt Earp and a group of his friends at Iron Springs, near Tombstone. Wyatt Earp killed him with a shotgun.
John Ringo may have been the last victim of the Earp-Clanton feud. “The Hamlet among Outlaws,” as Walter Noble Burns called him, was found dead near Tombstone with a pistol in his hand and a bullet in his brain. The wound may have been self-inflicted-there is evidence Ringo was a depressive. Wyatt Earp, however, claimed to have killed him, though Wyatt may have been in Colorado at the time. Ringo left behind a small library of classic works, including some in Latin, giving him a posthumous reputation as a frontier intellectual. It is unlikely that he ever attended university, and he seems to have been self-educated.
Ike Clanton fled Tombstone in the aftermath of the war he had done so much to start, but did not alter his belligerent, drunken ways, and was killed by detective J. V. Brighton in 1887.
John Behan, unable or unwilling to stop the violence in Tombstone, failed to win reelection as sheriff. Thanks to his political contacts he became warden of the Yuma prison, though there were those who claimed he should have been on the other side of the bars.
John Holliday continued to roam the West, usually with his Hungarian companion “Big Nose Kate” Elder, until his death from tuberculosis in 1887. Despite his long illness and hazardous life, he outlived all the men who wanted him dead.
Wyatt Earp never acted as a lawman after his spell in Tombstone, and instead became a gambler and entrepreneur. Traveling from one Western boom town to the next, he made and lost many fortunes, and in his later years became the friend of Jack London, William S. Hart, Tom Mix, Charlie Chaplin, and the film director John Ford. He lived happily with Josie Marcus until his death in 1929, and was buried in a Jewish cemetery near San Francisco.