Jacob A. (Jacob August) Riis

Born in Ribe, Denmark, in 1849, Jacob Riis immigrated to the United States as a young man and experienced poverty firsthand before finding work as a journalist. Those early struggles shaped the sympathy and urgency that ran through his reporting for New York newspapers.

Riis became known for documenting life in the city's overcrowded slums, combining vivid writing with early flash photography to show conditions many comfortable readers had never seen. His 1890 book How the Other Half Lives brought wide attention to dangerous housing and urban poverty, and it helped make him one of the most influential reform-minded writers of his era.

He was more than an observer: Riis pushed for practical change in housing, sanitation, and public welfare, and his work influenced civic reformers including Theodore Roosevelt. Today he is remembered as a crucial early voice in photojournalism and social reform, and as a writer who used storytelling to press the public to look more closely at city life.