One of my friends here (a fellow PhD candidate) and I have an on going conversation about what makes a theologian have a lasting impact. When talking about someone like say, Karl Barth, there is a school of thought that says he had some sort of innate genius. There are others who would argue that he happened to be the right person at the right time. As we discuss it more, I think that we are both convinced that lasting impact has more to do with the environment surrounding a person than the innate genius of the person. That is not say many of the people we remember weren't geniuses. It is just acknowledging that there are many who were geniuses but have been forgotten.