Stress and warfare among the Kayenta Anasazi of the thirteenth century A.D. / Jonathan Haas
https://archive.org/details/stresswarfareamo21haas
review
https://blogs.scientificamerican.com/guest-blog/in-search-of-the-origins-of-warfare-in-the-american-southwest/#
The ancient origins of warfare and violence / I.J.N. Thorpe
http://courses.washington.edu/war101/readings/Thorpe_2005.pdf
https://archive.org/details/stresswarfareamo21haas
review
https://blogs.scientificamerican.com/guest-blog/in-search-of-the-origins-of-warfare-in-the-american-southwest/#
The ancient origins of warfare and violence / I.J.N. Thorpe
http://courses.washington.edu/war101/readings/Thorpe_2005.pdf
