This Upton Sinclair expose of the meatpacking industry helped lead to the 1906 Pure Food & Drug Act
The Pure Food and Drug Act regulated 
food... [DOC] [TLE] The Jungle and the Progressive Era | The Gilder Lehrman Institute of ... [PAR] The publication of Upton Sinclair's 1906 novel The Jungle produced an ... 
McClure's Magazine led the way, in October 1902, with a series by Lincoln 
Steffens that ... to about $11,500 in 2008) to prepare an expos on the 
meatpacking industry.