Targeting the Hunting Hypothesis: Review of Evidence From the Hadza

Area of Science:

• Evolutionary Anthropology
• Human Origins
• Behavioral Ecology

Background:

• The hunting hypothesis posits that paternal provisioning of meat by ancestral human males to their mates and children drove the evolution of nuclear families.
• This hypothesis links big game hunting by males to significant changes in human life history and social structures.
• It assumes a direct correlation between male hunting success and the formation of early human family units.

Purpose of the Study:

• To critically evaluate the hunting hypothesis using data from contemporary East African Hadza hunter-gatherers.
• To explore an alternative model, the grandmother hypothesis, as an explanation for human life history evolution and social unit formation.
• To assess the role of female foraging and resource sharing in the development of ancestral human social structures.

Main Methods:

• Analysis of behavioral data from Hadza hunter-gatherers in an environment analogous to ancestral Homo evolution.
• Review and theoretical evaluation of existing data and evolutionary models concerning human family origins.
• Comparative analysis of the hunting hypothesis and the grandmother hypothesis based on ecological and social factors.

Main Results:

• Empirical data from the Hadza contradict central tenets of the hunting hypothesis, particularly regarding male provisioning exclusivity.
• Evidence suggests that female foraging, especially by older women, played a crucial role in resource availability.
• The findings support the grandmother hypothesis's emphasis on female contributions to resource sharing and social stability.

Conclusions:

• The hunting hypothesis's model of early human family formation requires re-evaluation in light of new evidence.
• The grandmother hypothesis offers a compelling alternative, highlighting the significant impact of post-reproductive females on life history evolution.
• Ancestral social structures may have been shaped more by female resource provisioning and mate guarding than solely by male hunting and paternal investment.