  Modern cosmology rests on the cosmological principle, that on large enough
scales the Universe is both homogeneous and isotropic. A corollary is that
galaxies' spin vectors should be isotropically distributed on the sky. This has
been challenged by multiple authors for over a decade, with claims to have
detected a statistically significant dipole pattern of spins. We collect all
publicly available datasets with spin classifications (binary
clockwise/anticlockwise), and analyse them for large-angle anisotropies ($\ell
\le 2$). We perform each inference in both a Bayesian and frequentist fashion,
the former establishing posterior probabilities on the multipole parameters and
the latter calculating $p$-values for rejection of the null hypothesis of
isotropy (i.e. no power at $\ell>0$). All analysis indicate consistency with
isotropy to within $3\sigma$. We isolate the differences with contrary claims
in the ad hoc or biased statistics that they employ.
