  This review addresses the question of the chirality of $b$ quark weak
couplings from a theoretical and from a purely phenomenological point of view.
Due to their small magnitude $b$ decay couplings are subject to possible large
corrections from right-handed terms, on the one hand, and do not affect the
weak interactions of the first two quark families in any observable manner, on
the other hand. This motivated an $SU(2)_L\times SU(2)_R\times U(1)$ model with
purely right-handed $b$-decay couplings. The model is consistent with
experiments, including recent measurements of a lepton forward-backward
asymmetry in $B\to D^*\ell\nu$ and of radiative $B$ decays. Parity violating
asymmetries in semileptonic decays of polarized $\Lambda_b$ baryons produced in
$Z^0$ decays provide a promising way of measuring the chirality of the $b$ to
$c$ current.
