One Climate Cycle Defined the Human DNA Switches That                       Differentiates Humans From Primates

   The Brain Expanded, Languages Were Formalized,                       Collective Learning Began

   Mobility Increased and Was Used to Avoid Local Risks By              Seeking Shelter, Enhancing Food Availability and             Avoiding Danger

   Evolution Fostered The "Selfish" Gene (Dawkins 1976)