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.
A lung disease, common among miners
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".
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
The increasing rivalry among European nations during World War I can be attributed to nationalism and militarism. Nationalism fueled intense competition as countries sought to assert their dominance and protect their interests, often leading to conflicts over territories and imperial ambitions. Militarism, characterized by an arms race and the glorification of military power, created a volatile environment where nations were prepared for conflict, further escalating tensions and rivalries.
Miners, among others, are people that work underground
People must make choices among competing alternatives
economics