It is not my core area. But the topic is very interesting and relevant for time. As a scholar of Political Science I should be able to review your methodological part of the research.
I have some doubts regarding your investigation. How is it possible to verify the development of a democratic society? 1) Analyzing relevant reference documents 2) Consulting the opinion of qualified referents 3) Analyzing the popular means of democratic exercise? 4) Another way that I will not see now.