Wrote the book "The Jungle" in 1906.
He was a Pulitzer-Prize winning author, who wrote over 90 books. He was considered one of the best investigators advocating socialist views. He gained his fame through his early 20th century novel "The Jungle," focusing on the horrors of the meat packing industry, and all the things that might "slip" into your meat in the packaging plant. Causing a public upheavle that contributed to the Pure Food and Drug Act and the Meat Inspection Act in 1906.