Damian Costello is Director of Postgraduate Studies at NAIITS: An Indigenous Learning Community. He is the author of Black Elk: Colonialism and Lakota Catholicism (Orbis Books, 2005).Damian Costello is Director of Postgraduate Studies at NAIITS: An Indigenous Learning Community. He is the author of Black Elk: Colonialism and Lakota Catholicism (Orbis Books, 2005).