  The Global Colour Model (GCM) of QCD is a quark-gluon quantum field theory
that very successfully models QCD for low energy hadronic processes. An
effective gluon correlator models the interaction between quark currents.
Functional integral calculus allows the GCM to be hadronised (i.e. expressed in
terms of meson and baryon fields). The dominant configuration of the hadronic
functional integrals is revealed to be the constituent quark effect, and is
identical to one version of the truncated quark Dyson-Schwinger equations
(tDSE). However the GCM shows that hadronic physics requires processes that go
beyond the tDSE. In this review examples of meson and nucleon processes are
given. The GCM also plays a pivotal role in showing how QCD may be related to
many other hadronic models.
