Naturalism is most often associated with the novels of Émile Zola in particular his "Les Rougon-Macquart" novel cycle, which includes "Germinal", "L'Assommoir", "Nana", "Le Ventre de Paris", "La Bête humaine," and "L'Œuvre" "(The Masterpiece)", in which the social success or failure of two branches of a family is explained by physical, social and hereditary laws. Other writers who have been labeled naturalists include: Alphonse Daudet, Jules Vallès, Joris-Karl Huysmans (later a leading "decadent" and rebel against naturalism), Edmond de Goncourt and his brother Jules de Goncourt, and (in a very different vein) Paul Bourget.