What did Lincoln Steffens Jacob Riis Ida Tarbell and John spar go have in common?

Lincoln Steffens, Jacob Riis, Ida Tarbell, and John Spargo were all prominent muckrakers in the early 20th century who aimed to expose social injustices and corruption in American society. They utilized journalism and investigative writing to shed light on issues such as political corruption, poor working conditions, and corporate monopolies. Their work played a significant role in the Progressive Era, advocating for reforms and raising public awareness about the need for social change. Through their efforts, they contributed to a greater understanding of the challenges faced by marginalized communities and the need for government accountability.