मॉरिस डुवर्गर द्वारा प्रतिपादित राजनीतिक दलों का संरचनात्मक वर्गीकरण मुख्य रूप से किस पर आधारित है?

Who among the following ancient thinkers is considered the father of comparative politics for systematically studying Greek city-state constitutions?

Arend Lijphart is best known for which of the following political theories?