SOURCES: How War Began, Keith Otterbein Warfare and Its Relationship to the Origins of Agriculture, Keith Otterbein A massacre of early Neolithic farmers in the high Pyrenees at Els Trocs, Spain, Kurt Alt et al Rock art from at least 67,800 years ago in Sulawesi, Adhi Oktaviana et al Violence in fishing, hunting, and gathering societies of the Atacama Desert coast: A long-term perspective (10,000 BP - AD 1450), Vivian Standen et al Multi-isotope biographies and identities of victims of martial victory celebrations in Neolithic Europe, Teresa Fernandez-Crespo et al Neolithic Bodies in Vrable - 7000 year old Headless Human Skeletons in an Enclosed LBK Settlement in South-West Slovakia, Martin Furholt et al Large-scale violence in Late Neolithic Western Europe based on expanded skeletal evidence from San Juan ante Portum Latinum, Teresa Fernandez-Crespo et al