Age of the muckrake -- Salvation through big business : George Kibbe Turner -- Law : Christopher Powell Connolly -- Competition I : Alfred Henry Lewis and Will Irwin -- Competition II : Burton Jesse Hendrick and Ida M. Tarbell -- Regulation of Wall Street : Samuel Hopkins Adams and Thomas W. Lawson -- Search for reform : Ray Stannard Baker -- Travelers along the way : Lincoln Steffens and David Graham Phillips -- Socialism : Upton Sinclair and Charles Edward Russell -- Celestial crown.