In the middle of the talk at Google, Angela Duckworth touched upon “relationship between cultural identity and GRIT”, which was very insightful. She brought attention to Finland as a national example of showing that relationship.
She said that there is a word called “Sisu” in Finnish that generally translates to “GRIT” but literally means humans’ internal “gut”. When Finns work on something challenging but they fall short, they reach their “Sisu” and do it anyway.
This totally makes sense to me that if you are raised with that kind of mentality that is woven in your culture, you would be on your way to be gritter as you grow up.