Which literary device is best shown in this passage?

The movement changed them; the highways, the camps along the road, the fear of hunger and the hunger itself, changed them. The children without dinner changed them, the endless moving changed them.

Men of property were terrified for their property. Men who had never been hungry saw the eyes of the hungry. Men who had never wanted anything very much saw the flare of want in the eyes of the migrants.

There is a crime here that goes beyond denunciation. There is a sorrow here that weeping cannot symbolize. There is a failure here that topples all of our success.