The role of the muckrakers in American history was to expose social, political, and economic corruption and injustices during the late 19th and early 20th centuries. They were investigative journalists who sought to bring about social change by uncovering and publicizing misconduct and wrongdoing. The term "muckraker" was coined by President Theodore Roosevelt in 1906 to describe these journalists, who were often seen as uncovering and "raking" through the "muck" or dirt of society. They played a significant role in shaping public opinion and raising awareness about issues such as child labor, industrial working conditions, political corruption, and consumer protection. The muckrakers utilized investigative reporting, extensive research, interviews, and firsthand observations to expose systemic problems and hold individuals and institutions accountable. Their work ultimately led to significant reforms and changes in various sectors, contributing to the Progressive Era in American history.