The Spread of Technology since 1900

Earlier this year, according to one study, the smart phone reached an important milestone: 50% market penetration in the United States. It’s a remarkably quick ascent, but just how remarkable? I’m no historian of technology, but Atlantic editor Alexis Madrigal (author of Powering the Dream: The History and Promise of Green Technology) recently looked at a … More The Spread of Technology since 1900