  We briefly review a variety of theoretical and phenomenological indications
for the probable importance of powerful diquark correlations in hadronic
physics. We demonstrate that the bulk of light hadron spectroscopy can be
organized using three simple hypotheses: Regge-Chew-Frautschi mass formulae,
feebleness of spin-orbit forces, and energetic distinctions among a few
different diquark configurations. Those hypotheses can be implemented in a
semi-classical model of color flux tubes, extrapolated down from large orbital
angular momentum $L$. We discuss refinements of the model to include the
effects of tunneling, mass loading, and internal excitations. We also discern
effects of diquark correlations in observed patterns of baryon decays. Many
predictions and suggestions for further work appear.
