Chanakya was known by names like Kautilya and Vishnugupta, and played multiple roles of being a teacher, philosopher, economist, jurist and royal advisor. Arthashastra and Chanakya Neeti were the two important books written by him. Chanakya Neeti is a collection of aphorisms, said to be selected by Chanakya from the various Shastras. The topics discussed are morality, ethics, governance, and several others. Chanakya is regarded as a great thinker and diplomat in India. Many Indian nationalists regard him as one of the earliest thinkers who dreamt of a united India, spanning the entire subcontinent.