pyramids, Roman aqueducts, and Gothic cathedrals; it has conducted expeditions that put in the shade all former migrations of nations and crusades. The bourgeoisie cannot exist without constantly revolutionizing the instruments of production, and thereby the relations of production, and with them the whole relations of society. Conservation of the old modes of production in unaltered form was, on the contrary, the first condition of existence for all earlier industrial classes. Constant revolutionizing