>> princeton university professor kevin kruse talks about the role of historians on social media and what he feels is their duty to provide context to issues. he also discusses how media consumption has changed since the 1970s. this 13-minute interview was recorded in chicago at the annual american historic association meeting. >> kevin kruse is a professor at princeton university, out with a new book this movement the title, fault lines, a history of america since 1974. what's the premise behind it? >> it comes from a course we taught for a couple of years. post 1974 in history is distinct. one the historians need to treat at its own thing rather than a postscript. it's a discreet area that we need to dig into on its own terms. >> you had the resignation of richard nixon in 1974. the first and only appointed president gerald ford, and the cold war that was at its peak. >> that's right. the cold war in some ways, it goes into de taunt, and that period, in a period of flux but global affairs are in a real state of turmoil. you've got the end of the vietnam war. really taking place. 19