Smartphones. They have spurred a global revolution in how we work, play, shop, and relate to one another. They fuel innovation and productivity in astonishing ways, reaching even the most distant and undeveloped corners of the world. They have empowered the disenfranchised, democratized information sharing, and shined a spotlight on corruption. They are also addictive and pervasive, affecting everything from personal health to public safety. And all of this has happened in less than ten years.