  I argue that background freedom in quantum gravity automatically leads to a
dissociation of the quantum state into states having a classical space. That
is, interference is not completely well-defined for states with different space
geometries, even if their linear combination is. Interference of states with
different space geometry is still allowed at small scales, but precluded at
macro-scales. Macrostates, including measuring devices, appear classical. The
distribution of space geometries automatically gives the Born rule. The
dissociation entails a kind of absolute decoherence, making the ad-hoc
wavefunction collapse unnecessary. This naturally leads to a new version of the
many-worlds interpretation, in which: 1) the classical space-states form an
absolute preferred basis, 2) at any time, the resulting micro-branches are like
classical worlds, with objects in space, 3) macro-branches stop interfering,
even though micro-branches can interfere (as they should), 4) the space
geometries converge at the Big-Bang, favoring macro-branching towards the
future, 5) the wavefunctional becomes real by absorbing the phases in the
global U(1) gauge, 6) ontologically, the wavefunctional consists of many gauged
space-states, each of them counting as a world by having local beables (the
space geometry and the classical fields), 7) the density of the classical
space-states automatically obeys the Born rule.
