Every aspect of cinematic language —the cutting, camerawork, audio, and period design elements— sing harmoniously together in Mona Fastvold’s historical romance, “The World to Come.” A lovelorn lesbian story reflecting on loss and those life-altering moments which become possible when a new, impossible smile starts orbiting your world, Fastvold’s film — starring the exceptionally talented Katherine Waterston and Vanessa Kirby as Abigail and Tallie, a pair of 19th Century pioneer women who