Which topic is explored in the intercalary chapters of grapes wrath?

The intercalary chapters in *The Grapes of Wrath* explore the larger social and economic forces that are shaping the lives of the Joad family and other migrant workers. These chapters often:

* Provide historical context: They delve into the Dust Bowl, the economic depression, and the history of exploitation of farm workers.

* Illustrate the plight of the poor: They showcase the hardship, desperation, and lack of opportunity faced by the marginalized.

* Explore themes of community and resilience: They depict the ways in which migrant workers band together for support and how they maintain hope amidst adversity.

* Offer a broader perspective: They step back from the Joad family's individual story to present a larger picture of the social injustices and human struggles of the time.

Essentially, the intercalary chapters serve as commentary on the events of the novel, providing a wider context and deeper understanding of the suffering and hope experienced by the characters.