Hi Brendan, I have written two commentaries on Jack's work, a Max Planck lecture and a chapter in the Olson/Cole festschrift. His masterpiece is Death, Property and the Ancestors (1962). Production and Reproduction (1976) launched is great sequence of comparative history. The Domestication of the Savage Mind (1977) is a brilliant critique of Levi-Strauss. I like The Theft of History (2007) and The Eurasian Miracle (2010) summariizes his comparison of East and West.