If you are talking about Rii’s work called, “ How the Other Half Lives: Studies among the Tenements of New York,” then you are referring to his photojournalism work in the 1890s.
Jacob Rii was a man known to have exposed the life of New York’s slums into the middle and upper class. He exposed the truth about how people actually survive and live under these conditions. Through this he has inspired many reforms of working-class housing and made a great and lasting impact in today’s society.