Bibliography (9):

1. Music in Human Evolution

2. A Thrive/Survive Theory Of The Political Spectrum

3. Many heads are more utilitarian than one

4. Coalitional Value Theory: an Evolutionary Approach to Understanding Culture

5. Origins of music in credible signaling

6. The search for predictable moral partners: Predictability and moral (character) preferences

7. Social threat indirectly increases moral condemnation via thwarting fundamental social needs

8. Wikipedia Bibliography:

   1. Group selection

   2. https://en.wikipedia.org/wiki/The_Descent_of_Man,_and_Selection_in_Relation_to_Sex  :

      https://en.wikipedia.org/wiki/The_Descent_of_Man,_and_Selection_in_Relation_to_Sex