  We review consequences for the radiation and dark sectors of the cosmological
model arising from the postulate that the Cosmic Microwave Background (CMB) is
governed by an SU(2) rather than a U(1) gauge principle. We also speculate on
the possibility of actively assisted structure formation due to the
de-percolation of lump-like configurations of condensed ultralight axions with
a Peccei-Quinn scale comparable to the Planck mass. The chiral-anomaly induced
potential of the axion condensate receives contributions from SU(2)/SU(3)
Yang-Mills factors of hierarchically separated scales which act in a screened
(reduced) way in confining phases.
