<P> How the Other Half Lives: Studies among the Tenements of New York (1890) was an early publication of photojournalism by Jacob Riis, documenting squalid living conditions in New York City slums in the 1880s . It served as a basis for future "muckraking" journalism by exposing the slums to New York City's upper and middle classes . This work inspired many reforms of working - class housing, both immediately after publication as well as making a lasting impact in today's society . </P> <P> In the 1880s many people in upper - and middle - class society were unaware of the dangerous conditions in the slums among poor immigrants . After the Civil War, the country transformed into an industrial superpower and became largely urban . Also, a wave of unskilled southern European, eastern European, Asian, and Jewish immigrants came to settle in the "promised land" of the United States . This migration was vastly different from the previous booms due to the influx of non-western European and non-Protestant individuals, therefore making the split between the "new" and "old" immigrants much larger . In the 1880s, over 5.2 million immigrants came to the United States, with many of these people staying in New York City . This increased New York City's population 25%, therefore making the tenement problem much more extreme . </P>

Who wrote the book how the other half lives
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