Class conflict is an important motif in the novel, and class distinctions exert a constant influence on the behaviors and motivations of the characters. The Bennet family is not as high-class as the Bingley or Darcy families, several members of which make that fact obliquely but eminently clear. While Mr. Bennet remains largely indifferent to his daughters' prospects for marriage, his wife is eager to see them marry into money, despite the resistance to such a prospect by the families of their more well-off suitors. Much of the class tension plays out in dialogue between characters of different social strata.
The title of the novel reflects one of its two main conflicting forces: pride. As the relations between the characters progress, their sense of pride wields heavy influence over their actions. Social class, ego or a sense of entitlement induces an exaggerated pride in certain characters. Consider, for example, the scene in which Mr. Darcy expresses prideful disdain for the locals and arrogantly rebuffs Elizabeth at a dance. However, Elizabeth matches his pride with her own: She regards him with a sardonic attitude and biting wit for half of the novel.
Prejudice represents the other side of the titular conflict in Austen's novel. The personal and class-based biases of individuals figure heavily in their motives and desires. Consider the example of Elizabeth and Mr. Darcy. Elizabeth prejudges him to be prideful, rude and brusque, a supposition that is later discredited, but one that creates a source of conflict in their initial relationship. Conversely, Mr. Darcy and Lady Catherine harbor prejudice against Elizabeth and her family because of their socioeconomic background. Such negative prejudgment sets the characters in opposition from the beginning, forcing them (Elizabeth and Darcy in particular) to see past their prejudice in order to overcome such conflict.
Not all the conflicting forces in the book are external. A number of characters (Darcy and Elizabeth, for example) are influenced by internal conflicting forces over what they desire and how to pursue it. Within Mr. Darcy, his firm pride runs up against his new-found desire for Elizabeth. Elizabeth wrestles with her own prejudice against Mr. Darcy's character when confronted with evidence that he is a better person than she initially she supposed. The internal conflicts of these characters achieve resolution when love and desire win out, and their courtship resolves in a second marriage proposal.