One can question whether the term "field" is appropriate for what is, arguably, a relation of "interdisciplinarity" between two established and quite distinct, even separate, fields, namely theology and science. I use the term here both in a descriptive, rather generic sense since it is often used this way in conversations about ‘theology and science’, and to signal in advance that, in my opinion, sufficient results have been accomplished over the past four decades, primarily in the methodology described here, to warrant considering this a genuine field of study. Moreover, I hope to show that it is a genuinely interactive field in which both sides contribute to each other’s research programs, though in significantly different ways. (See Part 3-E).