Give Caste: The Origins of Our Discontents a look. Wilkerson's got well researched links between India's caste system, U.S. Slavery, and the German Nazis. I was really surprised to learn that the Nazis researched national policies to find out how to best institute 'purity'. They ended up modeling theirs after the United States.

Fascims might not look the same every where, but it shares more than was obvious to me...