When electricity was first generated commercially, there was a conflict of interests over whether AC or DC would be the dominant form of transmission. Edison - who'd opened the Pearl Street Station in 1882 - backed DC, whereas Westinghouse backed AC. Mostly remembered today for the first use of the electric chair, and stunts involving electrocution of animals - infamously including an elephant.
https://energy.gov/articles/war-currents-ac-vs-dc-power
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