Yuval Noah Harari has a very interesting explanation for the success of human beings over other species -
I would like to elaborate on the second point here. Think about it - the human life span is really short. How does one advance knowledge past a single human's time scale - say a 100 years. There are two ways to transcend time -
The above in my opinion has helped humans transcend time and have an impact much larger than the finite lifespan of a single human being.
We should therefore be thankful of the folklore, family stories, history that each of us is passed on by our ancestors.