The Grapes of Wrath is an American realist novel written by John Steinbeck and published in 1939. For it he won the annual National Book Award and Pulitzer Prize for novels and it was cited prominently when he won the Nobel Prize in 1962.

Set during the Great Depression, the novel focuses on the Joads, a poor family of sharecroppers driven from their Oklahoma home by drought, economic hardship, and changes in financial and agricultural industries. Due to their nearly hopeless situation, and in part because they were trapped in the Dust Bowl, the Joads set out for California. Along with thousands of other "Okies", they sought jobs, land, dignity, and a future.

The Grapes of Wrath is frequently read in American high school and college literature classes due to its historical context and enduring legacy. A celebrated Hollywood film version, starring Henry Fonda and directed by John Ford, was made in 1940.

The Great Depression began with the Wall Street Crash of October, 1929 and rapidly spread worldwide. The market crash marked the beginning of a decade of high unemployment, poverty, low profits, deflation, plunging farm incomes, and lost opportunities for economic growth and personal advancement. Although its causes are still uncertain and controversial, the net effect was a sudden and general loss of confidence in the economic future. The usual explanations include numerous factors, especially high consumer debt, ill-regulated markets that permitted overoptimistic loans by banks and investors, the lack of high-growth new industries, all interacting to create a downward economic spiral of reduced spending, falling confidence, and lowered production.

Industries that suffered the most included construction, agriculture as dust-bowl conditions persisted in the agricultural heartland, shipping, mining, and logging as well as durable goods like automobiles and appliances that could be postponed. The economy reached bottom in the winter of 1932–33; then came four years of very rapid growth until 1937, when the Recession of 1937 brought back 1934 levels of unemployment. The depression caused major political changes in America. Three years into the depression, Herbert Hoover lost the 1932 presidential election to Franklin Delano Roosevelt in a sweeping landslide. Roosevelt's economic recovery plan, the New Deal, instituted unprecedented programs for relief, recovery and reform, and brought about a major realignment of American politics.