In this post we want to focus mostly on magic and religion, and how these elements must go hand in hand with the technological level of the campaign and the kind of society in which it develops.
These four elements are the cornerstones of many of the epic fantasy campaigns I know. If we want to create our own stage, we must define each of these elements, and the relationships between them.
The chart below shows these four elements. In the case of religion and society, the levels are not really such: a society can jump directly to the last step, or stay forever anchored in the primary level. The direction of evolution is from the inside out.