A pretty interesting article, speculative as some of it may be.

 

Privation

A state in which things that are essential for human well-being such as food and warmth are scarce or lacking.

 

Agape

Greco-Christian term referring to the highest form of love (for man, God, charity), unconditional love

 

Storge

Familial love that is natural or instinctual affection, as love of a parent towards offspring and vice versa