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
Source: The Free Dictionary