: While some early humans may have practiced forms of polygyny (one male, multiple females), research into early hominids suggests a trend toward pair-bonding. This helped in the shared effort of raising "expensive" offspring who required long periods of care. Inter-species Interaction
This interbreeding likely helped our ancestors survive by introducing new immune system genes as they migrated into different climates. 2. From "Promiscuity" to Social Bonds
Review Profile