Titan: The Life of John D. Rockefeller, Sr. by Ron Chernow (already listed, but sometimes repeated in expanded lists)
John D. Rockefeller, Sr. stands as one of the most influential figures in American history, particularly in the realm of business and philanthropy. Born on July 8, 1839, in Richford, New York, he would go on to become a titan of industry, revolutionizing the oil industry and establishing a business model that would be emulated...
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