Chicago bet its reputation on winning the fair, then nearly failed to build it

Larson opens with Chicago's fierce campaign to win the right to host the 1893 World's Fair over rival cities, especially New York, driven by a civic hunger to prove the city had recovered from the Great Chicago Fire of 1871 and could rival the sophistication of Paris's 1889 exposition, famous for unveiling the Eiffel Tower. Winning the bid was itself a triumph of civic boosterism, but it immediately created an almost impossible engineering and logistical challenge: an entire fairground city had to be designed and built from swampy, undeveloped land in roughly two years.

Daniel Burnham, the chief architect, faced brutal weather, labor strikes, financial shortfalls, and the sudden death of his design partner John Root, all while coordinating dozens of architects, engineers, and landscape designers including Frederick Law Olmsted. Larson conveys the sheer improbability of the fair opening on schedule at all, given how frequently the entire project teetered on collapse.

Takeaway: the grandest achievements often look inevitable only in hindsight — while being built, they usually look like they might fail entirely.