Section II uses the method-for-theory outlined in Section I to attempt to begin construction of a theory of human ecosystems. The rationale for seeking integration and synthesis is explored first, and some of the motivating questions are identified. Then, following the anatomy of theory outlined in Section I, we systematically go through some of the components that we have identified as starting points for the development of a theory of human ecosystems. This is a preliminary effort to bring together relevant pieces of disparate research and ideas to show the value of having a clear grasp of the methodology behind the development of theory, and to promote holistic thinking among students of human ecology. Further work is obviously necessary before a coherent working theory of human ecosystems can be developed.