What is the theme in Howard's End by E. M. Forster?

Another important theme in Howards End concerns straggle and conflict within the middle class. The aristocracy and the very poor do not make an appearance in this novel; the novelist states that "[w]e are not concerned with the very poor," but instead with the "gentlefolk, or with those who are obliged to pretend that they are gentlefolk." The three families in Howards End each represent different levels of the middle class The Schlegels occupy the middle position, somewhere between the Basts, who exist at the lower fringes of the middle class, and the Wilcoxes, who belong to the upper-middle class. Leonard Bast, the clerk, lives near the "abyss" of poverty, while the Schlegels live comfortably on family money, and Henry Wilcox, the wealthy business man who grows steadily richer, has money for "motors" and country houses.