Towards a proof of the equivalence between FRW background expansion and
  statistical isotropy
  We will expose in this paper our advances towards a proof of the equivalence
between FRW background expansion, during some period of time that contains
primordial inflation, and the statistical isotropy of the primordial curvature
perturbation $\zeta$ at the end of this period of time. Our motivation rests on
the growing interest in the existence of a preferred direction in the Universe
hinted by the continuous presence of anomalies in the CMB data.
