Read this excerpt from Friedrich Engels’s The Condition of the Working Class in England. Every great city has one or more slums, where the working-class is crowded together. . . . The streets are ge

Read this excerpt from Friedrich Engels’s The Condition of the Working Class in England. Every great city has one or more slums, where the working-class is crowded together. . . . The streets are generally unpaved, rough, dirty, filled with vegetable and animal refuse [trash], without sewers or gutters, but supplied with foul, stagnant pools instead. Which point does Engels make in this passage?