Existing comment: A "bullish" economy

Bison were a staple of the economy in the 1800s. As Americans became more industrial, the need for machine belts made from hides grew and grew. Sport-hunting also became the rage. Railroad companies offered tourists a chance to shoot bison from the coaches; one record-setting rider killed as many as 120 animals in 40 minutes. Within 50 years, the great herds were gone.
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