TheSeven Iron Men, also known as theMerritt brothers, were iron-ore pioneers in theMesabi Range in northeasternMinnesota and the creation of the city that is now known asMountain Iron.^[1] In the late 1800s, the Merritt family founded the largest iron mine in the world and initiated the consolidation of the American railway system into what would ultimately become theUnited States Steel Corporation. Their story was told, in part, by the bookSeven Iron Men byPaul de Kruif.^[2] The book was first published in 1929.

The brothers, actually five brothers and two nephews, charted the Mesabi Range and recorded the areas that demonstrated the highest potential for iron after they recognized what they had found.^[3] Due to the lack of railroads in the region, they were initially unable to transport the ore, but their discovery catalyzed the growth ofrailroads in the region.^[1] The railroad became the center of conflict between the Merritt Brothers andJ. D. Rockefeller,^[4] to whom they were eventually forced to sell their stake in Mountain Iron^[1] in 1893.^[5]

The Seven Iron Men consisted of four of the sons of Lewis Howell Merritt and Hephzibah Merritt – Leonidas, Alfred, Andrus, and Cassius – as well as three of their grandsons, John, Wilbur, and Bert.^[6] The primary figure of the Merritt family wasLeonidas. He was born inChautauqua County, New York, where he lived until age 7, when he moved to western Pennsylvania until age 12.^[7]In 1856, his family moved to live in a community of five or six families inDuluth, Minnesota, just after the 1854Treaty of La Pointe transferred land from theOjibwe and where his father, Lewis Howell Merritt, worked as a lumberman and a millwright.^[8] He joined the Army to fight in theCivil War and returned after his father had failed to discovergold in theVermillion orMesabi Mountain Ranges. The black "banded ore" rocks that his father brought back to Duluth from the Mesabi Range convinced Leonidas to explore the Mesabi Mountains.^[7]

Mesabi is derived from theOjibwe word for'giant',^[9] but is said to have a broader meaning of'the grandmother of them all', as it relates to the division between water flowing into theHudson Bay from the water flowing intoLake Superior.^[7]Geology professor Van Hise had proposed a "trough theory," explaining how the mountains potentially contained ore-filled troughs at various places. Leonidas developed a magnetic survey and mapped out the ore troughs in the area. With money saved 16 years working as alumberjack, Leonidas bought land for $1.25 an acre and opened what became the largest iron mine in the world,Mountain Iron Mine.^[7]

Leonidas was initially joined by his brother Alfred and later by five other family members, as they sought investors. They discovered iron in 1891, after building trails into the mountains and hiring villagers to drill into the troughs. The brothers reinvested their earnings. As soon as the iron was discovered, geologists explored the mountains. One mining expert scorned the Mountain Iron Mine, making it difficult to obtain outside investors. In 1891 the family incorporated theDuluth, Missabe and Northern Railway Company to build a 70-mile-long railroad.^[8] The Merritts raised $400,000 which they advanced to the railroad company in exchange for bonds.

The Seven Iron Brothers owned the largest iron mine in the world during the 1890s. Their success attracted the attention of other wealthy Americans, such as Rockefeller, who was expanding into the iron ore business at that time. The Merritt Brothers put their company stock up as collateral to borrow money from Rockefeller to fund the railroad. In the span of several months, the Merritt Brothers lost their personal wealth and interest in both their mining and railroad corporations. In a series of financial transactions, Rockefeller came to own both the Mountain Iron Mine and the Railroad, leaving the Merritt Brothers financially ruined. Rockefeller's move attracted the attention ofAndrew Carnegie and through consolidations, the world's first billion-dollar cooperation, theUnited States Steel Corporation, would be founded.

In 2011, the economic impact upon America of the steel industry was estimated to contribute $101.2 billion to USGDP and to support 943,045 jobs.^[10] It generated $22.9 billion in tax revenues and created seven jobs in the United States economy for every one job created in the steel industry.^[10]

• U.S. Steel
• John D. Rockefeller

• Walker, David A. (March 2004).Iron Frontier: The Discovery and Early Development of Minnesota's Three Ranges. Minnesota Historical Society Press.ISBN 978-0-87351-491-0.
• Polta, Harold J. (1971).Mesabi Range iron ore transportation: feasibility and estimated cost of pipelining. U.S. Dept. of the Interior, Bureau of Mines.
• King, Frank Alexander (1972).The Missabe Road: The Duluth, Missabe and Iron Range Railway. U of Minnesota Press.ISBN 978-0-8166-4083-6.
• Morris, Charles R. (3 October 2006).The Tycoons: How Andrew Carnegie, John D. Rockefeller, Jay Gould, and J. P. Morgan Invented the American Supereconomy. Henry Holt and Company.ISBN 978-1-4299-3502-9.
• King, Frank Alexander (2003).Minnesota Logging Railroads. U of Minnesota Press.ISBN 978-0-8166-4084-3.
• Chernow, Ron (18 December 2007).Titan: The Life of John D. Rockefeller, Sr. Knopf Doubleday Publishing Group.ISBN 978-0-307-42977-3.
• Lamppa, Marvin G. (1 January 2004).Minnesota's Iron Country: Rich Ore, Rich Lives. Lake Superior Port Cities.ISBN 978-0-942235-56-2.
• "Merritt Brothers". Minnesota Historical Library.
• "Economic Impacts of the American Steel Industry". Timothy J. Considine. University of Wyoming. 2012.
• Stanley, Augustus Owsley; MacRae, Farquhar J. (1911).United States Steel Corporation: Hearings Before the Committee on Investigation of United States Steel Corporation. House of Representatives. [In Eight Volumes]. U.S. Government Printing Office.

• The Merritt Family and the Mesabi Iron Range in MNopedia, the Minnesota Encyclopedia

• American families
• History of mining in the United States
• 19th-century people from Minnesota

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