A. Royden D'souza

Arthashastra emphasizes that these first five categories—the fraudulent disciple, recluse, householder, merchant, and ascetic—constitute the five established institutes of espionage (samsthāḥ).

Arthashastra, a manual on statecraft so detailed and pragmatic that it makes Machiavelli's The Prince seem like a preliminary sketch. Written in Sanskrit, this ancient Indian treatise on statecraft, politics, economic policy, and military strategy is a monumental work of political realism.