When you plug in your toaster, you benefit from the results of a bitter feud from the late nineteenth century. Back then, inventors Thomas Edison and Nikola Tesla battled over which was the best kind of electricity for development: direct current (DC), like the current that goes from a battery to a flashlight; or alternating current (AC), which we get from an electrical outlet.

Eventually, Tesla’s AC ideas powered through and have been used to provide electricity for homes, businesses, and communities around the world. AC is much more efficient at sending electricity across great distances and proved to be the…