Criticisms of cosmopolitan democracy have come from realist, marxist, communitarian and multicultural perspectives. Democratic theorist Robert Dahl has expressed his doubts about the possibility of expanding democracy in international organizations to any significant degree, as he believes that democracy diminishes with size. Opponents of Dahl's approach point to the fact that bigger countries are not necessarily less democratic. For example, there is no correlation between voters' turnout and population size; in fact it is smallest in countries with fewer than 100,000 citizens.