Bourgeois revolution

Each step in the development of the bourgeoisie was accompanied by a corresponding political advance of that class. An oppressed class under the sway of the feudal nobility, an armed and self-governing association in the medieval commune: here independent urban republic (as in Italy and Germany); there taxable “third estate” of the monarchy (as in France); afterwards, in the period of manufacturing proper, serving either the semi-feudal or the absolute monarchy as a counterpoise against the nobility, and, in fact, cornerstone of the great monarchies in general, the bourgeoisie has at last, since the establishment of Modern Industry and of the world market, conquered for itself, in the modern representative State, exclusive political sway. The executive of the modern state is but a committee for managing the common affairs of the whole bourgeoisie.

— Karl Marx, The Communist Manifesto

The “have-nothing” masses of Paris, during the Reign of Terror, were able for a moment to gain the mastery, and thus to lead the bourgeois revolution to victory in spite of the bourgeoisie themselves. But, in doing so, they only proved how impossible it was for their domination to last under the conditions then obtaining. The proletariat, which then for the first time evolved itself from these “have-nothing” masses as the nucleus of a new class, as yet quite incapable of independent political action, appeared as an oppressed, suffering order, to whom, in its incapacity to help itself, help could, at best, be brought in from without or down from above.

— Friedrich Engels, Socialism: Utopian and Scientific