Between economic growth and social development, or the development of civil society A lot of classic social theory links the emergence of modern civil society to economic development.28 Adam Smith in The Wealth of Nations noted that the growth of markets was related to the division of labor in society: as markets expand and firms take advantage of economies of scale, social specialization increases and new social groups (for example, the industrial working class) emerge. The fluidity and open access demanded by modern market economies undermine many traditional forms of social authority and force their replacement with more flexible, voluntary forms of association. The theme of the transformative effects of the expanding division of labor was central to the writings of nineteenth-century thinkers like Karl Marx, Max Weber, and Emile Durkheim.