What was one of Jacob Riis articles and why did he write it?

Perhaps his best-known article, along with some of his own Photography, was called "How the Other Half Lives: Studies among the Tenements of New York." It appeared in Scribner's Magazine in 1890. Riis wrote this article, and provided the pictures, to call attention to the terrible conditions of New York's slums, and to show the readers the struggles of New York's poor.