Personality traits like that are also normally distributed and the concept of 'grit' specifically is controversial: https://www.gse.harvard.edu/news/15/04/probl

Personality traits like that are also normally distributed and the concept of 'grit' specifically is controversial: https://www.gse.harvard.edu/news/15/04/problem-grit https://www.gse.harvard.edu/news/15/04/problem-grit https://en.wikipedia.org/wiki/Grit_(personality_trait)#Scientific_findings_and_controversy https://en.wikipedia.org/wiki/Grit_(personality_trait)#Scien...