Alfonso Cuarón’s Roma begins quietly and thoughtfully with the character, Cleo, played beautifully by Yalitza Aparicio, who serves a well-to-do family in their home in a suburb of Mexico City. Her life, seeming so insular and placid, will expand to engulf the film’s universe. Every action and word of hers has a hidden meaning, and minor gestures seen early in the movie will be echoed by more serious and violent actions later.