Looking for a single physics theory.

  Current model of everything (of the existence) is very complicated. There are things contradicting each other. There are other things which are ambiguous. The obvious example would be the wave-particle duality. We, already, discovered so many properties of elementary particles and suspect that there are more. We probably double the complexity of the physics every decade if not faster. There are different parts of the physics - classic mechanics, physics of the elementary particles, different theories. Nobody understands why gravitational interaction is similar to electromagnetic but it's so different. In other words it looks like a mess in physics. I'm looking for an answer, for a single theory that will place everything in order. Anybody has one?