2. Identify at least three examples of the power of the muckrakers of the late nineteenth and early twentieth centuries.

1. The exposure of political corruption: One of the most prominent examples of the muckrakers' power was their role in uncovering political corruption. Upton Sinclair's novel "The Jungle" exposed the unhygienic and exploitative conditions in the meatpacking industry, which led to the passing of the Pure Food and Drug Act and the Meat Inspection Act in 1906. This not only improved working conditions but also ensured safer food for consumers.

2. Reforming the healthcare industry: Another significant impact of the muckrakers was their focus on healthcare. Ida Tarbell's investigative journalism on the unethical practices of the Standard Oil Company exposed the monopolistic practices of the industry. This eventually led to the dissolution of the company in 1911, making it a pivotal case for antitrust legislation.

3. Social advocacy for marginalized groups: The muckrakers played a crucial role in advocating for the rights of marginalized groups. For example, Jacob Riis used his photography and writing to expose the squalid living conditions in New York City tenements and advocate for tenement reform. Similarly, Lincoln Steffens' articles and book "The Shame of the Cities" shone a light on political corruption, particularly in urban areas, and led to increased demands for political accountability.

Overall, the power of the muckrakers stemmed from their ability to expose societal injustices, influence public opinion, and push for legislative changes to address these issues. Their investigative reporting brought about significant reforms in various sectors, ensuring greater accountability and social progress.