  The occurrence of spontaneous chiral symmetry breaking (SChSB) is equivalent
to sufficient abundance of Dirac near-zeromodes. However, dynamical mechanism
leading to breakdown of chiral symmetry should be naturally reflected in chiral
properties of the modes. Here we offer such connection, presenting evidence
that SChSB in QCD proceeds via the appearance of modes exhibiting dynamical
tendency for local chiral polarization. These modes form a band of finite width
Lambda_ch (chiral polarization scale) around the surface of otherwise
anti--polarized Dirac sea, and condense. Lambda_ch characterizes the dynamics
of the breaking phenomenon and can be converted to a quark mass scale, thus
offering conceptual means to determine which quarks of nature are governed by
broken chiral dynamics. It is proposed that, within the context of SU(3) gauge
theories with fundamental Dirac quarks, mode condensation is equivalent to
chiral polarization. This makes Lambda_ch an "order parameter" of SChSB, albeit
without local dynamical field representation away from chiral limit. Several
uses of these features, both at zero and finite temperature, are discussed. Our
initial estimates are Lambda_ch~150 MeV (N_f=0), Lambda_ch~80 MeV (N_f=2+1,
physical point), and that the strange quark is too heavy to be crucially
influenced by broken chiral symmetry.
