Kantaka Sodhana (removal of thorns) is Kautilya's framework for dealing with criminals, fraudsters, and antisocial elements - the 'thorns' that threaten society. This chapter explores proportional punishment, rehabilitation vs. deterrence, the role of the Nagaraka (city superintendent), and how to provide security without becoming tyrannical. Even criminals have rights - torture has strict limits, and the innocent must be protected.