Multi dimensional theory not needed

In theoretical physics, M-theory is an extension of string theory in which 11 dimensions of spacetime are identified as 7 higher-dimensions plus the 4 common dimensions (11D st = 7 hd + 4D). Proponents believe that the 11-dimensional theory unites all five 10-dimensional string theories (10D st = 6 hd + 4D) and supersedes them. Though a full description of the theory is not known, the low-entropy dynamics are known to be supergravity interacting with 2- and 5-dimensional membranes.

>br/> Theories like this, and like general relativity result from the starting point concept. To start from scratch, the universe needs complete knowledge. If you assume the universe can cycle through until it balances, then you only need one dimension and two quantization rates. We still need bubbles, and we still ponder where they come from, but that is a separate story.