Mario Paz has, in the Romantic Agony, acutely analyzed the effect of the traditions of Byron and De Sade upon poets and painters from 1800 to 1900. It is the analysis of a mood in literature. The mood may ve been transient, but it was widespread, and it was expressed in dreams of "luxurious cruelties," "fatal women," corpse-passions, and the sinful agonies of delight. Professo Praz has described the whole Romantic literature under one of its most characteristic aspects, that of erotic sensibility.

Child of materialism and positivism, Courbet was without a doubt one of the most complex painters of the nineteenth century. Symbolising the rejection of traditions, Courbet did not hesitate to confront the public with the truth by liberating painting of conventional rules. He became from then on the leader of pictorial realism.