The Scarlet Plague by Jack London

I went away hastily, down a cross-street, and at the first corner I saw another tragedy. Two men of the working class had caught a man and a woman with two children, and were robbing them. I knew the man by sight, though I had never been introduced to him. He was a poet whose verses I had long admired. Yet I did not go to his help, for at the moment I came upon the scene there was a pistol shot, and I saw him sinking to the ground. The woman screamed, and she was felled with a fist-blow by one of the brutes. I cried out threateningly, whereupon they discharged their pistols at me and I ran away around the corner. Here I was blocked by an advancing conflagration. The buildings on both sides were burning, and the street was filled with smoke and flame. From somewhere in that murk came a woman's voice calling shrilly for help. But I did not go to her. A man's heart turned to iron amid such scenes, and one heard all too many appeals for help.

"Returning to the corner, I found the two robbers were gone. The poet and his wife lay dead on the pavement. It was a shocking sight. The two children had vanished -- whither I could not tell. And I knew, now, why it was that the fleeing persons I encountered slipped along so furtively and with such white faces. In the midst of our civilization, down in our slums and labor-ghettos, we had bred a race of barbarians, of savages; and now, in the time of our calamity, they turned upon us like the wild beasts they were and destroyed us. And they destroyed themselves as well.