Explanation: Steinbeck may have selected The Grapes of Wrath for his title because, though not generally grape pickers, his novel is about fruit pickers. The term' ' grapes of wrath'' is a biblical allusion, or reference, to the Book of Revelation, verse 14:19-20, which reads,'' Then the angel swung his sickle to the earth and gathered the clusters from the earth's vine and threw them into the great wine press of god.