If emotions are universal, morality would be objective since everyone would feel a similar way about what is good and bad. Beauty, also, would no longer be in the eye of the beholder, since beautiful things would elicit similar reactions universally. If, conversely, human emotions are purely dependent on one’s cultural group, then ethics and aesthetics are relative and subjective. This episode discusses what is so often the direct output of emotions: facial expressions. Where did research into this area begin? Part 1 of a 2-part series.

https://www.insightfulthinkersmedia.com/

References: 

Griffiths, P. E. (2003). Emotions. In S. P. Stich & T. A. Warfield (Eds.), The Blackwell guide to philosophy of mind (pp. 256–309). Blackwell.

Hwang, H., & Matsumoto, D. (2016). In M. K. Mandal & A. Awasthi (Eds.), Understanding facial expressions in communication (pp. 19–57). Springer