Child labor: Riis also exposed the widespread use of child labor in New York City factories and workshops. These children often worked long hours in dangerous conditions for little pay. Riis' work helped lead to the passage of child labor laws that restricted the hours and conditions under which children could work.
Poverty: Riis' photographs and writings also shed light on the extent of poverty in New York City. He showed that poverty was not just a matter of individual laziness or immorality, but rather a systemic problem caused by factors such as low wages, unemployment, and poor housing. Riis' work helped to generate public support for social reform programs that aimed to alleviate poverty.
Immigration: Riis also wrote about the challenges facing immigrants in New York City. He showed that immigrants often faced discrimination, prejudice, and exploitation. Riis' work helped to humanize immigrants and dispel some of the negative stereotypes about them.