Sociological Explanation of Democracy: A Fuzzy Cross- National Study from 1990-2010

The problem of this study is differtiation degree of democracy. At theoritical level, component of social capital and Inequality of income distribution and unrentier revenue are necessary condition for democracy.The method of this essay is the comparative cross- national. population of this study is 156 countries that have data for comparison, but in each analysis,because of missed data, quantity of cases is different . The method of judging of hypothesis is Fuzzy and used software is spss, Exel and Fs/QCAf. Empical results show in the almost always cases, Interpersonal Trust and unrentier revenue are necessary condition for democracy. Participation in Civil Society and Trustworthines and Inequality in distribution income usually are necessary condition for democracy. Assessment of sufficient conditions for taking place of result show that there are three separate path for democracy. common specification of this pathes is high Participation in Civil Society and unrentier revenue.