From what I understand (armchair physicist here, having read Greene’s books and whatever I can find on the net) String Theory describes the fundamental particles and forces of nature in terms of the different modes of vibration of “strings” - Planck-scale extended objects. There’s also something about these strings being attached (sometimes?) to n-dimensional “branes”.
From what I can see, String Theory deals with what happens to the strings as they move through time, but contents itself with time being the mysterious background ticking of a cosmic clock. I know that time is neither a particle or a force – at least, I think I know that but no one seems quite sure of the exact nature of time – but if String Theory is truly a TOE, shouldn’t time emerge as one of its “results”, in the same way that particles and forces do? Is it the case that time is just accepted as an “axiom” in String Theory?