A Lakota Sioux, Vine Deloria, Jr. is one of the most outspoken figures in Native American affairs. His works promote Native American cultural nationalism and a greater understanding of Native American history and philosophy. In his work, Deloria fights prejudice against American Indians while addressing current issues, such as political and treaty rights. He is also concerned with the struggle between a religious view of life and the secularization that science and industry promote. He warns that people need to re-evaluate their stance to planet earth or humans may be one of the few species that has permanently ruined their habitat. From the Series:Danz Lecture Series