Quoting the article: > A boom in railroad construction, 33,000 miles (53,000 km) of track were laid across the country between 1868 and 1873. > The railroad i

Quoting the article: > A boom in railroad construction, 33,000 miles (53,000 km) of track were laid across the country between 1868 and 1873. > The railroad industry was the largest employer outside of agriculture and involved large amounts of money and risk. A large infusion of cash from speculators caused spectacular growth in the industry and in the construction of docks, factories, and ancillary facilities. Most capital was involved in projects offering no immediate or early returns. Sounds like the AI bubble.