[Birth, life, and death of a public policy: an ethnography of the Open Arms program].

Public policies for the crack cocaine scene known as Crackland (São Paulo, Brazil) have been implemented for decades, but there has been no comprehensive description of such policies. We conducted this study due to the importance and innovative nature of the Open Arms program, in order to provide a comprehensive picture of the program, from its beginning until it was closed down. The description involves: (i) a survey of the activities developed by public agents who preceded the program and who directly influenced its formulation; (ii) a description of the status of Crackland when Open Arms was launched; (iii) specification of the institutional actors and their respective roles; and (iv) an explanation of the main events marking this public policy's development until its extinction.