What did work of Riis and Sinclair show?

The works of Jacob Riis and Upton Sinclair highlighted the harsh realities of life for the poor and working class in America during the late 19th and early 20th centuries. Riis, through his Photography and writings in "How the Other Half Lives," exposed the squalid conditions of tenements in New York City, advocating for social reform. Meanwhile, Sinclair's novel "The Jungle" revealed the appalling conditions in the meatpacking industry, leading to public outcry and significant regulatory changes. Together, their works underscored the need for social justice and reform in industrial America.