Dark Romanticism is a literary sub-genre of Romanticism, reflecting popular fascination with the irrational, the demonic and the grotesque. Often conflated with Gothic fiction, it has shadowed the euphoric Romantic movement ever since its 18th-century beginnings. Edgar Allan Poe is often celebrated as one of the supreme exponents of the tradition. Dark Romanticism focuses on human fallibility, self-destruction, judgement, punishment, as well as the psychological effects of guilt and sin. The term "Romanticism" originates from a Latin word called "romant", which means "in the Roman Manner." Not only has it become an iconic style of art, but also had an effect on literature and music. It was driven on emotions and imagination rather than science and rationality. The Romantic Movement began in Europe at the end of the 18th century and migrated to America in the early 19th century. Between 1830 and 1865, American Romanticism authors were at their most productive. Within Romanticism, two conflicting sub-genres arose: optimists who believed in human virtue and spirituality formed the Transcendentalism Movement, while pessimists who accepted human fallibility and our proclivity for sin formed the Dark Romantic Movement. Romanticism's celebration of euphoria and sublimity has always been dogged by an equally intense fascination with melancholia, insanity, crime and shady atmosphere; with the options of ghosts and ghouls, the grotesque, and the irrational. The name "Dark Romanticism" was given to this form by the literary theorist Mario Praz in his lengthy study of the genre published in 1930, The Romantic Agony. According to the critic G. R. Thompson, "the Dark Romantics adapted images of anthropomorphized evil in the form of Satan, devils, ghosts, werewolves, vampires, and ghouls" as emblematic of human nature.