ABSTRACT
The major problem with contemporary physics is commonly acknowledged
to be the incompatibility of Einstein’s general theory of relativity (GTR) and
quantum mechanics (QM). The prospects of unifying these two theories into
a quantum gravity (QG) theory seem insurmountable. Witten’s M-theory
(and string theory in any form), perturbative QG (e.g. the Hartle-Hawking and Vilenkin proposals), topological QG, loop QG and other ideas about
QG are not unifications but are speculations about what might belong to an
approximation of a ‘‘complete quantum gravity theory’’ that is not yet known
to be possible or even conceivable. No resolution of the incompatibility of
Einstein’s GTR and QM has been achieved and there is none in sight.
