Indian political philosophy evolved in ancient times and demarcated a clear distinction between (1) nation and state (2) religion and state. The constitutions of Hindu states evolved over time and were based on political and legal treatises and prevalent social institutions. The institutions of state were broadly divided into governance, administration, defense, law and order. Mantranga, the principal governing body of these states, consisted of the King, Prime Minister, Commander in chief of army, Chief Priest of the King. The Prime Minister headed the committee of ministers along with head of executive (Maha Amatya).
What evolved over time and is based on legal treaties and obscure social institutions?