Not just the best sci-fi movie of the last 15 years, but one of the best movies period, Alfonso Cuaron’s bravura dystopian masterpiece cemented the Mexican helmer’s status as not just a fast-rising star, but as one of our very, very best. Based on P.D. James’ novel, it’s set in a world where no children have been born in two decades, and society has collapsed as humanity waits to die out. Theo (Clive Owen) is entrusted with transporting a young immigrant woman (Claire-Hope Ashitey) who is pregnant, the first person in a generation to be so. Aside from its central premise, everything about “Children Of Men” is chillingly plausible, and Cuaron’s vision is brought to life seamlessly with subtle VFX and the never-bettered docudramish photography of Emmanuel Lubezki (including two of the greatest extended shots in cinema history). The cast, including Julianne Moore, Michael Caine, Chiwetel Ejiofor, Charlie Hunnam, Peter Mullan, and Danny Huston, are impeccable, it’s disarmingly funny, deeply sad, enormously exciting, fiercely political, and endlessly inventive, and people will be stealing from it for decades to come. Though many dismissed it on release as being too bleak, that was to miss the point: “Children Of Men” is a film about hope, and in the 21st century, we need all the hope we can get.