Intense rivalry among competing miners often led to violence. Mining of stone and metal has been done since pre-historic.
Rivalry is intense and sometimes angry competition, game, action or position among individuals or groups who are trying to outperform each other in a given activity or competition. In sports for example, a long time rivalry in college football would be a game between Harvard and Yale.
The Ohio State-Michigan Rivalry is considered the most intense rivalry. Alabama vs. Auburn - The Iron Bowl... consider... the game was not played for nearly forty years because of a dispute over per diems for the players. Alabama holds the series lead 39-28 (and a few meaningless ties) Very good rivalry but, of all the ones I've actually witnessed with my own two eyes, Clemson(ACC vs.South Carolina (SEC) takes the cake. I'm a Big Ten fan (Penn St) but some of the SEC ones are among the "Most heated".
A lung disease, common among miners
Contentious rivalry or disagreement among members of a group or organization
competition
They divided the world among themselves, so as a rule there is no rivalry. But many say other things.
imperialism
The competitive dimension
Miners, among others, are people that work underground
People must make choices among competing alternatives
Anti-British feelings among the colonists grew more intense because of Paul Revere's engraving of the Boston Massacre.
Thomas Stewart has written: 'Among the miners' 'Valentia, or, The fatal birth-day'