With theaters still not operating fully, for the most part, many of us have turned to streaming services to watch movies, whether they're new or not so new. "Great Films of the 21st Century" explores the films I have seen in my career as a film critic and consider to be the best thus far. Be sure to check them out on whatever streaming service you subscribe to. Up in the Air Director: Jason Reitman Stars: George Clooney, Vera Farmiga, Anna Kendrick, Jason Bateman Rated: R (for language and some sexual content) You could make a case that novelist Walter Kirn and director Jason Reitman deserve a place right alongside literary naturalists Theodore Dreiser and Frank Norris. Kirn’s novel, which is the inspiration for this screen adaptation, isn’t naturalism in its purest sense. But it does take elements of this philosophy and makes it more accessible. Take lead character Ryan Bingham (George Clooney). He is most comfortable keeping everyone at an arm’s distance...