Which author wrote "The Jungle," highlighting social issues and conditions in the meatpacking industry?

"The Jungle," written by Upton Sinclair, is a notable work that critiques the unsanitary and inhumane conditions prevalent in the meatpacking industry during the early 20th century. Sinclair aimed to shed light on the exploitative practices and poor working conditions faced by immigrant workers in Chicago's meatpacking plants. His vivid and often shocking descriptions of the processing and treatment of meat products had a profound impact on public perception and led to significant reforms in food safety laws, including the establishment of the Pure Food and Drug Act and the Meat Inspection Act in 1906.

This work is significant not only for its literary value but also for its role in influencing public policy and raising awareness about labor rights and food safety. Sinclair's approach exemplifies how powerful storytelling and journalism can provoke social change and highlight critical issues within society.