Sinclair was a prolific American novelist and socialist activist who wrote over 90 books, including The Jungle, a best-selling muckraking exposé of conditions in the Chicago meat-packing industry that aroused public indignation and resulted in the passage of food inspection laws in the US. He also organized a socialist reform movement in the 1930s and won the Democratic nomination for governor of California but was defeated in 1934. For what book was Sinclair awarded the Pulitzer Prize? Discuss