In a three-month period at the end of 1879, Thomas Edison tested the first practical electric lightbulb, Karl Benz invented a workable internal-combustion engine, and a British-American inventor named David Edward Hughes transmitted a wireless signal over a few hundred meters. These were just a few of the remarkable breakthroughs that Northwestern University economist Robert J. Gordon tells us led to a “special century” between 1870 and 1970, a period of unprecedented economic growth and improvements in health and standard of living for many Americans.
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