Upton Sinclair and Lincoln Steffens are primarily known for exposing corruption in business or government.
Upton Sinclair was a novelist and social activist, most famous for his book "The Jungle," which revealed the harsh conditions and exploited lives of immigrants in the United States in industrialized cities. His work particularly highlighted issues in the meatpacking industry, leading to public outrage and reforms in food safety.
Lincoln Steffens was a journalist and a key figure in the muckraking movement, known for his work in exposing corruption in city governments across the United States, particularly in his famous collection of articles titled "The Shame of the Cities."
Both played significant roles in the Progressive Era by bringing attention to social issues and advocating for reform.