POLI 100K, Railroads and American Politics: Topic 5, The Evolution of Railroad Technology

Common Threads

1. Multiple Inventors of Original Technology -- Near Simultaneous Emergence of the same technology in several different locations.
   
   
2. Rapid Incremental Improvements
   
   
3. "Mature" Technology After 20 Years Followed by a Long Period of Relative Technological Stability
   
   

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