http://en.wikipedia.org/wiki/Theory_of_everything_(philosophy)
In philosophy, a theory of everything or TOE is an ultimate, all-encompassing explanation of nature or reality. [1] [2] [3] Adopting the term from physics, where the search for a theory of everything is ongoing, philosophers have discussed the viability of the concept and analyzed its properties and implications. [1] [2] [3] Among the questions to be addressed by a philosophical theory of everything are: "Why is reality understandable?" "Why are the laws of nature as they are?" "Why is there anything at all?" [1]