Upton Sinclair published "The Jungle" in 1906, which revealed conditions in the meat packing industry in the United States and was a major factor in the establishment of the Pure Food and Drug Act and Meat Inspection Act. Sinclair wrote the book with the intent of addressing unsafe working conditions in that industry, not food safety. Sinclair was not a professional journalist but his story was first serialized before being published in book form. Sinclair considered himself to be a muckraker.