I was able to do To Sleep with Anger, a very powerful film about African Americans, their spirituality, and the things that happened within a small community and a family.
However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.
Many Nobel Prizes are awaiting good research to understand and explain the many mysteries of our bodies, such as the basic mechanism of memory or imagination.