1. In Memoriam

   • Peter B. Gray
   • Alyssa N. Crittenden
   • Brian Wood

   EditorialNotes 16 December 2019 Pages: 1 - 8

   

2. In Memoriam

   • Edward H. Hagen
   • Lawrence S. Sugiyama

   EditorialNotes 07 January 2020 Pages: 9 - 21

   

3. No Association between 2D:4D Ratio and Hunting Success among Hadza Hunters

   • Duncan N. E. Stibbard-Hawkes

   OriginalPaper 14 December 2019 Pages: 22 - 42

   

4. Breastfeeding Duration and the Social Learning of Infant Feeding Knowledge in Two Maya Communities

   • Luseadra J. McKerracher
   • Pablo Nepomnaschy
   • Mark Collard

   OriginalPaper 02 January 2020 Pages: 43 - 67

   

5. Effortful Control Development in the Face of Harshness and Unpredictability

   • Shannon M. Warren
   • Melissa A. Barnett

   OriginalPaper 03 January 2020 Pages: 68 - 87

6. The Effects of the Mating Market, Sex, Age, and Income on Sociopolitical Orientation

   • Francesca R. Luberti
   • Khandis R. Blake
   • Robert C. Brooks

   OriginalPaper 08 January 2020 Pages: 88 - 111