How did Gustave Courbet’s political beliefs affect criticism of his art?

Gustave Courbet’s political beliefs and his role as a social activist were deeply intertwined with the reception of his work, often fueling the intense criticism he faced from the art establishment.12

• Empathy for the Working Class: Courbet’s Realism was perceived by the government and conservative critics as rebellious because it depicted manual laborers as heroic figures rather than subjects for idealization. By portraying the lives and emotions of peasants with stark, realistic urgency, he assaulted the prevailing conventions of an art world that favored aristocratic or idealized themes.21
• Critical Polarization: Critics often defined their positions based on their reaction to his "brutal" style, which many viewed as a deliberate "pursuit of ugliness". While some defenders praised his sincerity and poetic truth, others—such as the Goncourt brothers and Théophile Gautier—dismissed his work, with Gautier labeling him a "mannerist of ugliness".2
• Posthumous Bias: Even after his death, Courbet’s reputation has been affected by his political leanings. Detractors have frequently judged his art solely through the lens of his socialism, often ignoring the artistic philosophy and technical innovations that influenced modern movements.1