Underclass  

"This scum of the depraved elements of all classes ... decayed roués, vagabonds, discharged soldiers, discharged jailbirds, escaped galley slaves, swindlers, mountebanks, lazzaroni, pickpockets, tricksters, gamblers, brothel keepers, tinkers, beggars, the dangerous class, the social scum, that passively rotting mass thrown off by the lowest layers of the old society." --The Eighteenth Brumaire of Louis Napoleon

"The lumpenproletariat, this scum of the decaying elements of all classes, which establishes headquarters in all the big cities, is the worst of all possible allies. It is an absolutely venal, an absolutely brazen crew. If the French workers, in the course of the Revolution, inscribed on the houses: Mort aux voleurs! (Death to the thieves!) and even shot down many, they did it, not out of enthusiasm for property, but because they rightly considered it necessary to hold that band at arm’s length. Every leader of the workers who utilises these gutter-proletarians as guards or supports, proves himself by this action alone a traitor to the movement." --The Peasant War in Germany

"The “dangerous class”, [lumpenproletariat] the social scum, that passively rotting mass thrown off by the lowest layers of the old society, may, here and there, be swept into the movement by a proletarian revolution; its conditions of life, however, prepare it far more for the part of a bribed tool of reactionary intrigue." --Manifesto of the Communist Party

"On the pretext of founding a benevolent society, the lumpen proletariat of Paris had been organized into secret sections, each section led by Bonapartist agents, with a Bonapartist general at the head of the whole. Alongside decayed roués with dubious means of subsistence and of dubious origin, alongside ruined and adventurous offshoots of the bourgeoisie, were vagabonds, discharged soldiers, discharged jailbirds, escaped galley slaves, swindlers, mountebanks, lazzaroni,1 pickpockets, tricksters, gamblers, maquereaux [pimps], brothel keepers, porters, literati, organ grinders, ragpickers, knife grinders, tinkers, beggars — in short, the whole indefinite, disintegrated mass, thrown hither and thither, which the French call la bohème; from this kindred element Bonaparte formed the core of the Society of December 10." --The Eighteenth Brumaire of Louis Napoleon