At first he seems to learn that you can't deny who you are -- people with a violent past can't just set aside the violence. The movie Unforgiven treats similar themes. But then, Wyatt does wind up living happily ever after with that actress, which is not totally dissimilar to the historical Earp.
In the movie as in real life, it was silver. The economy of Tombstone was based on mining, and a rich silver strike turned it into a boom town. When the silver was played out, Tombstone became a ghost town (complete with ghosts by some accounts).
The cast of Life of Wyatt - 2014 includes: Justin Cloutier
The Life and Legend of Wyatt Earp - 1955 Wyatt and the Captain 2-19 was released on: USA: 15 January 1957
The Life and Legend of Wyatt Earp - 1955 Wyatt Earp Becomes a Marshal - 1.1 was released on: USA: 6 September 1955
The Life and Legend of Wyatt Earp - 1955 Wyatt Wins One 5-11 was released on: USA: 10 November 1959
The Life and Legend of Wyatt Earp - 1955 Wyatt Earp's Baby 6-29 was released on: USA: 25 April 1961
The Life and Legend of Wyatt Earp - 1955 Wyatt's Love Affair 2-6 was released on: USA: 2 October 1956
The Life and Legend of Wyatt Earp - 1955 Wyatt's Bitterest Enemy 5-41 was released on: USA: 7 June 1960
The Life and Legend of Wyatt Earp - 1955 Wyatt Meets Doc Holliday - 2.33 was released on: USA: 23 April 1957
The Life and Legend of Wyatt Earp - 1955 Wyatt Earp Becomes a Marshal 1-1 was released on: USA: 6 September 1955
The Life and Legend of Wyatt Earp - 1955 Wyatt Meets Doc Holliday 2-33 was released on: USA: 23 April 1957
The Life and Legend of Wyatt Earp - 1955 Wyatt Earp Comes to Wichita 1-5 was released on: USA: 4 October 1955