Humankind has sought a simple, universal theorem representing the ultimate building block of nature. In searching, we have learned that energy and matter are complementary states of reality. Self-Utility - A Theory of Everything explains how within this universal design principle, "process" is also a complementary state of this same reality. Within this informational framework lies this unifying theory of existence - Self-Utility. Self-Utility represents a model of internal attributes that initiate causal outcomes. Self-Utility is an intrinsic determinism that wills its host's animation, wellbeing, and its existence! Self-Utility is inherent in humans, animals, plants, social systems, institutions, organizations, rocks, atoms, energy, ideas and even the cosmos itself. Self-Utility unites a diversity of "-ologies" under its common discipline. Personal application of this theory empowers us with a cognitively heightened sense of understanding, of insight, and of control over our behavior and ultimately of whom we are. Embracing the concept of Self-Utility gives us a reference to understand the dynamics of vast interacting networks of any type. It allows us to predict values and allegiances, thus ultimately predicting the behaviors of people, organizations and objects. And it empowers us to direct our being through interrelating cycles of influence. Self-Utility brings order to our whimsical World of whirling dervishes as if in a mystic circus.