John Steinbeck wrote "The Grapes of Wrath." Published in 1939, this powerful novel depicts the struggles of displaced families during the Great Depression as they seek a better life in California. Steinbeck's portrayal of themes such as inequality, family, and perseverance highlights the human condition amid societal challenges. The novel received critical acclaim and remains a cornerstone of American literature, resonating with readers through its exploration of resilience and social justice.