Culture is a pivotal organizing base for common social practices and characteristics (values, morals, expectations, religion, affiliations, behavior….etc) of any given group of individuals. There’re many theories and books on social sciences/humanities.

I like the idea of promoting a common culture, it'll help ease cultural tensions and clashes. I propose to have it taught at school. (poor kids!)

And yes, I believe culture can be enhanced, because it's not necessarily coherent.
Salam