Memory Game MuckrakersOnline version Memory Game by Jefferson County ESC he published his most well-known work “The Jungle,” Upton Sinclair she exposed the business practices of the head of industrial mogul John D. Rockefeller first to write about the conditions of the urban poor, and eventually photographing them Term used to describe the investigative journalists of the early 1900s who exposed many problems and issues in urban America. Ida Tarbell Muckrakers Jacob Riis