These portions of the narrative are especially effective in communicating this theme because they always preface the more detailed, Joad-oriented chapters; in essence, they set the stage for the particular aspects of the Joads' lives.
In this way, the commonality of experience adds gravity and importance to Steinbeck's Progressing hand-in-hand with the theme of industrialization, the idea of corporate greed is essential to the novel.
The workers could have easily been paid to pick those grapes, but instead the crops just lay to waste.
The anger and angst that the workers carry could easily be appeased, but isn’t due to the landowner’s miserliness.
So, instead, it is “growing heavy for the vintage.” The worker’s wrath is ripening, wrath that can soon be released in a burst of violence.
This last line of the chapter serves as a warning to the privileged, warning them of the retribution that will be wreaked against them if they do not see the error of their ways.
Steinbeck's novel transitions between chapters that detail the lives of the Joads and the chapters that deal with migrants more generally.
It is in these chapters, which discuss broader currents and trends, that the commonality of experience truly shines through.
Along with industrialization, the creation of high-powered machines has enabled corporate interests to move laborers off the land and render them irrelevant.
Furthermore, industrialization has led to a farming and economic process that involves both vertical integration and horizontal integration.