> "Three crucial factors that influenced how likely a female was to commit infanticide were: Living in a harsh environment, Motherhood that involved particularly high energy costs for the female, High competition for resources with other individuals. When such pressures reach a threshold, mums seem primed to kill. Hrdy is impressed with the work, though she questions why humans were not included. Hrdy has also studied infanticide in humans and points out that, in our society, mothers rely on particularly high levels of social support during the early stages of their child’s life. If that support isn’t there, human mothers may be more likely to neglect their children, even to the point of death."