John Davison Rockefeller, Sr. (July 8, 1839–May 23, 1937) was an American industrialist and philanthropist who played a pivotal role in the establishment of the oil industry, and defined the structure of modern philanthropy. In 1870, Rockefeller helped found the Standard Oil company. Over a forty-year period, Rockefeller built Standard Oil into the largest and most profitable company in the world, and became the world's richest man.
His business career was controversial. He was bitterly attacked by muckraking journalists; his company was convicted in the Federal Court of monopolistic practices and broken up in 1911. He gave up active management of Standard Oil in the late 1890s, while keeping a large fraction of the shares. He spent the last forty years of his life focused on philanthropic pursuits, primarily related to education and public health. He donated most of his wealth using multiple foundations run by experts. He was a devout Northern Baptist and supported many church-based institutions throughout his life.
Rockefeller may ultimately be remembered simply for the raw size of his wealth. In 1902, an audit showed Rockefeller was worth about $200 million, compared to the total national wealth that year of $101 billion. His wealth grew significantly after as the demand for gasoline soared, eventually reaching about $900 million, including significant interests in banking, shipping, mining, railroads, and other industries. By the time of his death in 1937, Rockefeller's remaining fortune, largely tied up in permanent family trusts, was estimated at $1.4 billion. Rockefeller's net worth over the last decades of his life would easily place him among the list of wealthiest persons in history. As a percentage of the United States economy, no other American fortune—including Bill Gates or Sam Walton—would even come close.