Biodemography and Evolution Blackwell, AD, Urlacher, SS, Beheim, B, von Rueden, C, Jaeggi, A, Stieglitz, J, Tumble, BC, Gurven, MD, Kaplan, H. 2017. American Journal of Physical Anthropology. 162(3) 441-461. DOI: 10.1002/ajpa.23128. 2017 Michael Gurven