Proprioception and pattern matching can be considered the origin of causality in a participatory universe. Instead of a simple linear arrow of time, Loop Quantum Gravity can divide time up into events, and the arrow time can be thought of as simply the default. Neither a backwards, random, nor fatalistic universe makes more then the most superficial sense, and the three dimensions we perceive are also by default. Two dimensions is not enough to support consciousness, while 4 dimensions gets too complicate fast.
Note, this also provides a simple explanation for the Three Body Problem and all of quantum mechanics, as being equally random and fated. Metals contain the same amount of information no matter how hot or mixed up, maintaining a clear division between kinetic and radiant energy. Which means Relativity must be reformulated as Information Theory.