Although the private sector brought electricity to the big cities—New York, Chicago, St. Louis—the federal government’s Rural Electrification Administration brought electricity to much of America, helping to make radio, electric appliances, television and telecommunications part of everyone’s daily lives. A good deal of private investment created these technologies, but the transformations that they wrought were enabled by the “hidden hand” of government, and citizens often experienced their value in unanticipated ways. – Scientific American