Could Someone Please Explain Exactly What String Theory and LQG Are Trying To Do? I have recently had the opportunity to ask this question to a couple prominent physicists, and they could not answer it. What is the purpsoe of these theories? What do they explain that is not explained by SR, GR and QM? What are the postulates of String Theory? Are there any? Is there any premise as simple or beautiful as Einstein saying "The speed of light is constant in all frames," or "energy is quantized," or Bohr stating, "The electron orbits the nucleus at only discrete energy levels." Does String Theory or LQG have any simple forumlas associated with them, such as E=mc^2, E=hv, or something like Shroedinger's Equation? Do they account for non-locality as demonstarted in EPR, Bell's Theorem, and Aspect's experiments? Does either theory unify Rel. and QM? Finally, why should we have to unify relativity and QM? Must we also unify Hiphop and Classical Music in some new musical genere? Or can we realize that each works in a given venue, and that music and the human heart underly both?