The Shame of the Cities refers to a series of investigative articles written by Lincoln Steffens in the early 20th century that exposed political corruption and social injustices in American cities. These writings played a crucial role in highlighting the widespread corruption within urban governance and pushed for progressive political reforms aimed at combating these issues. Steffens' work revealed how city officials colluded with businesses and engaged in unethical practices, sparking public outrage and prompting demands for reform.