What is a common description of john d rockefeller and andrew carnegie​

But when he was 38 he started the Keystone Iron Works, and he stayed with that until 1901. By then Keystone Iron had become U.S. Steel, and Andrew Carnegie had become one of the wealthiest men on the planet. John D. Rockefeller went into business when he was 20, and he picked up his first oil well as a sideline.

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the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.

1. temperance, abolitionist, suffragist