"I wonder how much the ability to persevere in the face of difficulty is affected by a persons genes?" That's character, and based on lingual evidence alone (w

"I wonder how much the ability to persevere in the face of difficulty is affected by a persons genes?" That's character, and based on lingual evidence alone (which I'll take to be a summation of collective knowledge) "the development of character" is very much an individual endeavor.