What injustices did muckracker Jacob riis document?

Muckraker Jacob Riis documented the harsh living conditions of the urban poor in late 19th-century America, particularly in New York City’s tenements. Through his groundbreaking work, particularly in the book How the Other Half Lives, he exposed issues such as overcrowding, unsanitary conditions, and inadequate access to basic necessities. Riis highlighted the struggles of immigrant families and the systemic neglect by city authorities, advocating for social reform and improved housing conditions. His work played a crucial role in raising public awareness and prompting legislative action against these injustices.