Thomas Edison didn’t invent the lightbulb, but he created something more important: the grid. Edison's system of power plants and wires brought lightbulbs to homes and offices and revolutionized modern life.
Edison was adamant that direct current (DC) should power America, and attacked competitors who said that alternating current (AC) was better. This sparked a bitter war between Edison and his rivals - and prompted Edison to become involved in the first case of a murderer being sent to the electric chair.
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