Edison had invested himself in direct current electricity while Westinghouse had invested in alternating current, which could be more easily transmitted at higher voltages over cheaper wires. In a campaign to discredit alternating current, Edison tried to convince people that it wasn’t safe, first by using it to electrocute animals and eventually by endorsing it for use in executing humans. Edison reasoned that people would not want the same current flowing into their homes that was used in the electric chair.
Oliver's post, and her further work on the death penalty in The Southern Journal of Philosophy and in her book, Technologies of Life and Death: From Cloning to Capital Punishment, offers a much-needed historical context for recent legislation allowing a return to electrocution in Tennessee, and for ongoing debates about capital punishment across the US.