With its giant mountain of copper, Butte, Montana, was the largest, richest, and rowdiest mining camp on the frontier. It was an ethnic stronghold, with the Irish Catholics in control of politics and of the best jobs at the leading mining corporation Anaconda Copper. City boosters opened a public library in 1894. Ring argues that the library was originally a mechanism of social control, "an antidote to the miners' proclivity for drinking, whoring, and gambling". It was also designed to promote middle-class values and to convince Easterners that Butte was a cultivated city.