Save this storySave this storySave this storySave this storyThe recent trend of movies set in the past but still within living memory is a natural effort to find out how the hell we got here, but I discern another underlying motive: to show life before social media and the primacy of cellphones in daily life. Directors are still struggling with the task of filming the digital world, whereas analog media, which depend on face-to-face action and interpersonal decision-making, are ready-made for movies. Gus Van Sant’s new crime drama, “Dead Man’s Wire,” is based on an incident from 1977, in which an Indianapolis man took hostage an executive at a mortgage company to which he owed money.