Final answer:
The basis for John Steinbeck's 1939 novel The Grapes of Wrath is the story of the Joad family's exodus from their Oklahoma farm to California in search of a better life during the Great Depression. The novel explores themes of community, family values, and the strength of collective action in the face of adversity.
Step-by-step explanation:
The basis for John Steinbeck's 1939 novel The Grapes of Wrath is the story of the Joad family's exodus from their Oklahoma farm to California in search of a better life during the Great Depression. The novel explores themes of community, family values, and the strength of collective action in the face of adversity. Steinbeck's portrayal of the Joads' journey and their realization that they need to join a larger social movement to improve the lives of all people reflects the struggles and experiences of many Americans during the Depression.