Biography
John D. Rockefeller was the first American billionaire and, in inflation-adjusted terms, one of the wealthiest individuals in modern history. He founded Standard Oil in 1870 and, through aggressive acquisition of competitors, pipeline control, and exclusive railroad rebates, came to control roughly 90% of US oil refining by the 1880s — a monopoly so complete that the US Supreme Court ordered its breakup in 1911.
Born in modest circumstances in upstate New York, Rockefeller had a lifelong habit of meticulous bookkeeping — he tracked every cent he spent from age 16 until his death at 97. His wealth at peak, adjusted to modern dollars, is estimated at $418 billion, though comparing historical fortunes to modern ones is methodologically uncertain.
Rockefeller gave away more than $500 million during his lifetime (worth tens of billions today), founding the University of Chicago and Rockefeller University. His business methods inspired antitrust legislation that still governs American commerce. His philanthropy reshaped higher education and medicine. And his rags-to-riches story remains the canonical American tale of starting from nothing.
Did You Know?
Rockefeller gave out dimes to strangers throughout his adult life as a gesture of thrift and goodwill. He distributed an estimated 35,000 dimes over his lifetime, handing them to caddies, maids, and passersby.