I should get around to watching Treasure of the Sierra Madre . I torrented it after reading this tidbit in Bullshit Jobs.

In 1880 a Protestant “home missionary” who had spent some years traveling along the Western frontier reported that: “You can hardly find a group of ranchmen or miners from Colorado to the Pacific who will not have on their tongue’s end the labor slang of Denis Kearney, the infidel ribaldry of [atheist pamphleteer] Robert Ingersoll, the Socialistic theories of Karl Marx.” Certainly a detail left out of every cowboy movie I ever saw! (The notable exception being The Treasure of the Sierra Madre, which does indeed begin with a scene where John Huston, as a miner, explains the labor theory of value to Humphrey Bogart.)