The Unified Theory of Humanity is a model framework I no longer use, but it was in my writing of about ten years ago. It works something like this: To model humanity, we use a combination of sciences in a "multi-disciplinary" approach. We use this in a ‘systems engineering’ scenario (where a system in this case is a spacecraft system or something similar). All of the sciences are needed along with project management and engineering. Thus Psychohistory is like a complicated system requiring all of the physical and social sciences as well as engineering and management. However, I no longer use this model. Presently what I am using is based upon analogies with software engineering and so far this seems to be working for me.