How do the bourgeoisie override national and cultural boundaries according to Communist Manifesto? What were the role of bourgeoisie in the establishment of nation states?

Marx and Engels tell that the bourgeoisie did not override national and cultural boundaries openly and did not transcend class conflict. Everything that they did is the creation of new classes and new conditions to develop new forms of fight for the place. Bourgeoisie itself was a product of long-term development from an oppressed class to a self-administrated organization. To attract society’s attention, the bourgeoisie tried to use industrialization as the most powerful means: to arrange competitions to choose the best one, to create levels to encourage one group of people, and to humiliate the loser.

One of the cherished dreams of the bourgeoisie was to protect its hegemonic position, and the development of national states provided the bourgeoisie with a chance to fight against the feudal orders and increase their impact on other groups of people. During its governing, the bourgeoisie tried to create more productive forces: the use of chemistry to agriculture, railways, and electric telegraphs promoted the fast development of certain groups of people, who were able to unite and formulate their national states.