The world market gave vast development to trade, navigation and communication. This development reacted to the extension of the industrial revolution, for example with the extension of industry, commerce, navigation, railways, in the same proportion in which the bourgeoisie developed. Their actions increased its capital, and overshadowed every class handed down from the Middle Ages. [2] Marx explains that the bourgeoisie cannot exist without always revolutionizing the instruments of production, and also the relations of production, and with them all the relations of society. Marx also explains that the bourgeoisie was constantly expanding its product market around the world, establishing itself and establishing connections everywhere (“the sun never sets on the British Empire”).