Unified theory only exists with quuantum gravity. In the large and small of it, the four separate forces of nature require the string explainations of quantum gravity to allow unified theory. We see here again that String Theory may specialize in providing a gap or bridge until further tools develop to provide concrete evidence

Maybe space/time is 3+1+1, 'width depth height' + time + gravity. Putting gravity as a dimension would give us a better or at least different perspective. Am I wrong in this or am I missing something else? 4+1, 3+1, 3+1+1, 11d+ in strings, end result ?+?+?+?+?+?+?+? so many questions too few answers. The universe is eternally speaking and we are only here to hear it for such a small amount of time.