What is the significance of the setting in (“All My Sons”)

All My Sons takes place in a small American town in August, a few years after World War II. The events of the play occur on a single set, the back yard of the Keller home, where a tree has recently been torn down by a storm. The Kellers are solidly middle-class and have a working-class background. This sets the stage for the drama to take place. The American dream seems both attainable as well as an illusion.