Hugh Urban (Ohio State University, Comparative Studies) just uploaded his chapter in the Oxford Handbook For the Study of Religion. The Chapter is titled “Purity” and is the 40th chapter in this estimable tome
View the paper here: https://www.academia.edu/t/bVrFj-K0r944Y-uJfh8/27219910/_Purity_Oxford_Handbook_for_the_Study_of_Religion_