Read the following passage from a critical essay analyzing the themes in a classic novel:
"In [the novel's name], the author utilizes motifs of isolation and disillusionment to explore the inner struggles of the protagonist. The desolate landscapes are not mere backdrops, but rather reflections of the character's mental state and the societal disconnect they experience. Through this lens, the narrative critiques the era's social norms, highlighting the characters' struggles against an unforgiving world and their quest for authenticity in a conformist society."
Based on this passage, what is the author’s primary purpose?