The Joad family faces the collapse of their livelihood during the Dust Bowl and migrates westward in search of survival. Driven by the promise of work in California, the family encounters systemic exploitation and the harsh realities of a labor market saturated with desperate migrants. The narrative follows their physical movement across the country, utilizing a third-person omniscient perspective that alternates between the intimate struggles of the Joads and broader, intercalary chapters that contextualize the economic and environmental catastrophe of the era.

Readers and critics frequently highlight the stark, unvarnished prose that captures the desperation of the Great Depression. Discussion often centers on the effectiveness of the intercalary chapters in grounding the personal narrative within a larger socio-economic framework. Many observers note the balance between the intimate character development of the Joad family and the broader critique of capitalist exploitation. The novel is widely recognized for its enduring commentary on human resilience and the necessity of collective action in the face of systemic adversity.