  By invoking an asymmetric metric tensor, and borrowing ideas from
non-commutative geometry, string theory, and trace dynamics, we propose an
action function for quantum gravity. The action is proportional to the four
dimensional non-commutative curvature scalar (which is torsion dependent) that
is sourced by the Nambu-Goto world-sheet action for a string, plus the
Kalb-Ramond string action. This `quantum gravity' is actually a non-commutative
{\it classical} matrix dynamics, and the only two fundamental constants in the
theory are the square of Planck length and the speed of light. By treating the
entity described by this action as a microstate, one constructs the statistical
thermodynamics of a large number of such microstates, in the spirit of trace
dynamics. Quantum field theory (and $\hbar$) and quantum general relativity
(and $G$) emerge from the underlying matrix dynamics in the thermodynamic
limit. The statistical fluctuations that are inevitably present about
equilibrium, are the source for spontaneous localisation, which drives
macroscopic quantum gravitational systems to the classical general relativistic
limit. While the mathematical formalism governing these ideas remains to be
developed, we hope here to highlight the deep connection between quantum
foundations, and the sought for quantum theory of gravity. In the sense
described in this article, ongoing experimental tests of spontaneous collapse
theories are in fact also tests of string theory!
