Writers tend to fall into three groups: one, two, or more. This means, at root, they write about one one person, the interaction between two people, or describe big narratives with a large cast of characters.
ONE: Franz Kafka, Ottessa Moshfegh, Lydia Davis
TWO: Mary Gaitskill, Norman Rush, Zadie Smith
MORE: Anton Chekhov, Jonathan Franzen, Margaret Atwood