Without having read any formal literature on the subject of the evolution of emotions, I hypothesize that different populations respond to the same situations with different emotions, and that the difference in responses is at least in part influenced by genetics.
If this is true, it means that:
- Within any country or region with different groups of people, one group's set of emotional responses is likely more successful in reproductive terms than another's.
- Some populations are happier, sadder, angrier, etc. than others overall.
- In an environment in which many groups have been recently mixed together (such as the US), it is not reasonable to assume any sort of norm for emotional response.
- There are likely very subtle and specific emotional responses that have evolved that are not describable with simple terms such as anger, sadness, happiness, melancholy and yet are quite common.
- Different species are on the whole happier, sadder, angrier etc. than others. For example, dogs might be happier than cats.
Growing up, I often felt like a Vulcan. Emotions seemed to be noise. As I've gotten older however, I've gotten better at interpreting them. I would like to know more about why we have the emotions we do. I would like to have a better language for expressing emotion, in order to understand it better.