What is the meaning of The Grapes of Wrath by John Steinbeck in the battle hymn of the republic?

The Grapes of Wrath by John Steinbeck explores the struggles of the Joad family as they face economic hardship and displacement during the Great Depression. The Battle Hymn of the Republic, a patriotic song from the American Civil War era, emphasizes themes of justice, freedom, and the moral righteousness of fighting for a noble cause. Both works highlight the resilience and spirit of the marginalized and oppressed, calling for social justice and empathy towards those in need.