Hominid sexual nature.

Area of Science:

• Evolutionary Psychology
• Anthropology
• Behavioral Biology

Background:

• Hominid social structures are built upon psychosomatic evolutionary adaptations aimed at maximizing reproductive success.
• Understanding the "sexual nature" of hominids requires analyzing traits of the last common ancestor, independent of social structures.
• Sexual jealousy is examined as a function of socio-environmental conditions.

Purpose of the Study:

• To identify psychosomatic evolutionary adaptations in hominids that enhance reproductive success.
• To define the core sexual strategies of female and male hominids.
• To explain the origins of patriarchal social structures, sexual coercion, and jealousy.

Main Methods:

• Extraction of key features from the hominid last common ancestor to define "sexual nature."
• Analysis of sexual jealousy in relation to socio-environmental factors.
• Definition of "sexuality cores" for female (selective polyandry) and male (tolerant promiscuity) hominids.

Main Results:

• Hominid "sexuality cores" lead to patriarchal social structures, sexual coercion, and jealousy.
• Male sexual jealousy stems from limited access to females; female jealousy arises from the need for protection and support.
• Female evolutionary adaptations (e.g., out-estrus sexuality, multiple orgasms) facilitate sperm selection.

Conclusions:

• Hominid social structures are fundamentally shaped by female sexual selectivity and proceptivity.
• The institution of marriage acts as a constraint on sexual selection within Homo sapiens.
• The identified "sexuality cores" provide a framework for understanding hominid social dynamics and reproductive strategies.