The Great Depression significantly influenced John Steinbeck's writing, leading to a focus on themes of struggle and social injustice. His experiences during this time, particularly witnessing the plight of migrant workers in California, shaped his narratives. In novels like *The Grapes of Wrath*, Steinbeck depicted the harsh realities faced by displaced families and the erosion of their hopes. This period prompted him to delve deep into the human condition, emphasizing empathy, solidarity, and the fight for dignity amidst adversity.