"We will apply insights from game theory to explain human social behavior, focusing on novel applications which have heretofore been the realm of psychologists and philosophers—for example, why people speak indirectly, in what sense beauty is socially constructed, and where our moral intuitions come from—and eschewing traditional economic applications such as industrial organization or auctions."

I learned about signalling theory in this course, among other insights into why society acts the way it does.

https://en.wikipedia.org/wiki/On_Human_Nature