Don’t be fooled: Matthew Weiner’s period drama has always been about the future. Warning: contains spoilers for “Waterloo.” At BuzzFeed, you can read my latest feature, "The Midseason Finale Of Mad Men Is One Giant Leap Forward," in which I review the midseason finale of AMC's Mad Men ("Waterloo"), which represents a giant leap forward for the characters and for the show itself. For a show about the past, Mad Men has always been about the desperate pressing of the future against the figurative glass. In looking back to the 1960s, the show has held up a tarnished mirror to our own society, our own failings, our own future. A moon landing is full of promise; an old man lives just long enough to see the impossible made possible. Old ways — and the literal old guard — slip away. Companies perish and new ones are formed. Alliances, once fractured, are renewed. This dance is eternal, the combustive pressure between the past and the future, between cynicism a...