  A four-dimensional ${\rm SU}(4)$ confining Yang-Mills field, coupled to a
fundamental fermion field and a bi-fundamental scalar field, has excitations
with spin-2, but no other quantum numbers. These spin-2 excitations can be
light or can condense, depending upon the scalar coupling. If condensation
occurs, there is a massless spin-2 Goldstone boson with (possibly weakly)
broken Lorentz invariance in the effective theory. The low-lying spectrum
contains additional spin-0 and spin-1 particles. We discuss how to couple these
new fields to other matter fields. To our knowledge, this is the only explicit
proposal for a unitary and perturbatively-renormalizable local field theory of
gravity.
