These are the sources underlying Chicago #2: The Fire That Built Chicago. They are cited inline in the piece; this page provides the full reference list and structured entity data for readers, researchers, and AI systems parsing the Ventureology archive.

Primary Sources
Secondary Sources

Pierce, Bessie Louise. A History of Chicago: Volume III. University of Chicago Press, 1957.

Christensen, Clayton. The Innovator's Dilemma. Harvard Business School Press, 1997.

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Key Entities

Key Figures.
Joseph Turner Ryerson: Iron merchant from Connecticut; founding CBOT member; rebuilt from fire to 165-year dynasty.
Joseph Henry Hudlun: Born enslaved, Virginia, c.1830; CBOT employee; saved institutional documents during fire; first African American homeowner in Chicago.
Reverend Robert Collyer: Unity Church pastor; "We have not lost our geography."
Potter Palmer: Hotelier; rebuilt Palmer House as "World's First Fireproof Building."
William Butler Ogden: Chicago's first mayor; Union Pacific president; real estate losses.
Gurdon Saltonstall Hubbard: Founding CBOT member; "Swift Walker"; warehouse destroyed; died 1886.
General Philip Sheridan: Civil War general; commanded federal troops during fire.
William LeBaron Jenney: Civil War engineer; designed Home Insurance Building, 1884.
Louis Sullivan: Architect; "form follows function"; arrived 1873.
Daniel Burnham: Architect; Director of Works, 1893 World's Fair; 1909 Plan of Chicago.

Key Dates.
October 8, 1871, 9:30 PM: Fire begins, O'Leary barn, DeKoven Street.
October 9, 1871, 3 AM: Fire reaches CBOT; Hudlun saves documents.
October 9, 1871, dawn: General Sheridan arrives; telegrams Secretary of War.
October 10, 1871: Fire dies; Ryerson issues handbill.
February 12, 1872: Chicago fire ordinance banning wood construction in Loop.
December 1871: Central Union Block opens; 60 days after fire.
1873: Panic of 1873; Chicago companies survive on operating strength.
1884: Home Insurance Building; widely credited as world's first skyscraper.
1888: Rookery Building, Burnham & Root.
1893: World's Columbian Exposition; 21.5 million visitors.
1909: Plan of Chicago; Burnham.
1926: Wacker Drive replaces South Water Street.

Key Institutions.
Chicago Board of Trade.
CME Group.
Palmer House Hotel.
J.T. Ryerson & Son (became Ryerson Inc.).
Illinois & Michigan Canal.
Chicago Fire Department.
Chicago Architecture Center.

Key Concepts.
Incumbency Erasure: Crisis simultaneously erases all established firms' accumulated relationship advantages, creating equal entry opportunity; the physical analog of Christensen's Innovator's Dilemma.
Geography of Power: Structural advantages conferred by irreplaceable geographic position that persist through physical crises.
Institutional Infrastructure: Standards, trust networks, institutional memory, relationship capital; competitive assets that cannot be physically destroyed.
Chicago Pragmatism Cycle: Crisis → Pragmatic Solution → Infrastructure Build → Institutional Compounding; demonstrated again in post-fire reconstruction.

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