May 6th 1940, John Steinbeck is awarded the Pulitzer Prize for his novel The Grapes of Wrath. The book traces the fictional Joad family of Oklahoma as they lose their family farm and move to California in search of a better life. They encounter only more difficulties and a downward slide into poverty. The book combines simple, plain-spoken language and compelling plot with rich description. One of Steinbeck's most effective works of social commentary, the novel also won the National Book Award.