Not everyone wants to live forever, but every culture has always desired immortality in one way or another. Humans have always believed in the possibility of another life, of a second act. We've also always hoped that there might be a way to avoid dying. The term "cultural-universal" is a complicated one, but I've heard it come up on numerous occasions while researching immortality.
A person who is good for anything ought not to calculate the chance of living or dying; he or she ought only to consider whether in doing anything he or she is doing right or wrong- acting the part of a good person or a bad person.