A new research paper looking into human sacrifice in nearly one hundred cultures, including pre-European New Zealand, has just been published. The study looked at Austronesian cultures, and delved into how equal and heirarchical a culture was and the role religion played, in relation to human sacrifice. It was published the journal Nature, and was a collaboration between researchers from the University of Auckland's School of Psychology, the Max Planck Institute for the Science of Human History, and Victoria University. Joseph Watts is a doctoral candidate at the University of Auckland, and he's the lead author of the study.