  We find remarkable agreement with the observed excitations of hadrons with a
simple three parameter mass relation of the SU(3) subgroup of the underlying
U(15/30) graded Lie group. The baryons are the appropriate supersymmetric
partners of the mesons. An interesting feature, which is a focus of current
interest, is that the baryons and isobars show parity doubling. Significantly,
the ground state baryons and mesons have no place in the fit, so that the
parity doubling is indicated only when excitation energy is available. This has
correspondence with the parity doubling seen in recent lattice calculations,
when thermal excitation is present. The agreement with experiment is comparable
to the semi-relativistic quark model which fits with many force parameters and
where the observed parity doubling is accidental. The gross splitting of the
levels is the same for the strange and the non-strange sectors, suggesting
flavour independence.

High Energy Physics - Phenomenology