These days our smartphone addiction has gotten so intense that many of us now habitually use the devices even when we’re supposedly unplugging. We listen to podcasts on our trail runs and endlessly document our weekend adventures for Instagram. All this has author Cal Newport deeply concerned. Newport has made a name for himself as a sort of canary in the digital coal mine, writing about the perils of our screen-dependent modern lifestyles. Last winter he published Digital Minimalism, a manifesto that proposes a reimagining of our relationship with technology that begins with a 30-day digital diet. Outside editor Christopher Keyes talks with Newport about his radical—but very simple—approach to technology and how it can work for everyone.