The personal life of John Steinbeck significantly informed his novels, reflecting his views on social justice and humanity. Growing up in California, the agricultural landscape and the plight of migrant workers became central themes in his works like "The Grapes of Wrath". His experiences during the Great Depression deeply influenced his narrative style, focusing on the struggles of the common man. Moreover, his relationships and interest in social issues motivated Steinbeck to use literature as a vehicle for change, exploring themes of hope and resilience amidst adversity.