Long ago it was said that 'one half of the world does not know how the other half lives.' That was true then. It did not know because it did not care. The half that was on top cared little for the struggles, and less for the fate, of those who were underneath, so long as it was able to hold them there and keep its own seat.

Jacob Riis revisited: poverty and the slum in another era (ed. Augustus m Kelley Pubs, 1973)