One last unlucky elephant. In the early 1900s, Thomas Edison was locked in a historic “war of currents” with George Westinghouse. Edison wanted the nation to use direct current; Westinghouse and Nikola Tesla wanted alternating current. That sounds like a pretty tame dispute, but Edison went to some horrific lengths to sway public opinion. To prove that AC was dangerous, he began electrocuting stray cats and dogs. He said they were being “Westinghoused.” He also secretly funded the first electric chair, which ran on AC but was underpowered — its first use resulted in “an awful spectacle, far worse than...