When the needs and desires of the haves and the have-nots clash with one another, the result can be chaos, as seen in the South Korean social satire/dark comedy "Parasite," the recent winner of four Oscars, including best picture, the first foreign language film ever to do so. Director Bong Joon Ho's class warfare comedy serves up big laughs -- and a lot to think about -- in a world where disparities grow larger every day.