Perhaps the most contentious subject in early twentieith century theology was the issue of the viability or not of natural theology. This polarity persists in contemporary theology, though today the issue has become even more honed directly in on the issue of analogy. However, this discussion is usually nebulous in that the perceived relationship between the analogy of being and natural theology is highly disputed. For most followers of Barth, the analogia entis simply entails natural theology. For other interlocutors like David Bentley Hart, it is precisely the analogia entis that rules out any natural theology of the sort that Barth criticized.
The point of all this is simply to ask the question of what we actually mean by the term natural theology. What is natural theology, properly speaking and how is it to be distinguished from other theological concepts such as general revelation or a theology of nature?