Question

Jacob Riis, Upton Sinclair, Lincoln Steffens, and Ida Tarbell are all associated with what American literary movement?

Answer 1

They were known as muckcrackers during the progressive era

Answer 2

The answer is: The Progressive Era, which was a social movement that affected many cultural areas.

They were known as the Muckrakers, a group of North American journalists at the beginning of the 20th century, the Progressive Era, they report a series of abuses of the time.  

Lincoln Steffens analyzed corruption in big cities in his work The Shame of the Cities.  

Upton Sinclair, in his work The Jungle, denounced the poor hygiene conditions of meat distributors of Chicago.

Ida Tarbell published a report about Standard Oil Rockefeller  

Jacob Riis was the first American journalist to use the magnesium flash, he published his photographic captures along with his newspaper articles and books, his most important work is How the other half lives.