What is the justice and injustice theme in The Grapes of Wrath?

In "The Grapes of Wrath," the theme of justice and injustice is prominently portrayed through the struggles of the Joad family and other migrant workers during the Great Depression. The novel highlights the systemic inequalities and exploitation faced by the poor, as they confront corporate greed and governmental indifference. Characters like Tom Joad embody the fight for social justice, emphasizing solidarity among the oppressed. Ultimately, Steinbeck critiques a society that prioritizes profit over human dignity, urging a collective response to injustice.