Joseph Green, the owner of an oil company in the 1860s, star…

Joseph Green, the owner of an oil company in the 1860s, started gaining more influence and money as his business started to flourish, to a point where he began controlling the entire southeastern half of the U.S. oil services. He followed a ruthless and cunning business strategy that involved exploiting workers and decimating the environment. In the context of the history of American business, Joseph Green most likely belonged to the _______.