We discuss rupergravity from an S-matrix point of view. Kinematical constraints on helicity amplitudes determine the spin-2 and spin-3/2 Born amplitudes almos! uniquely, and force Born ar.lplitudes in~olving spin-5 / 2 fermions to vanish. Global supersymmetry is then used to determine the Born amplitudes con~pletely. We suggest that Lorentz invariance, presence of only one (dimensional) coupling io!~stdiit K, and global supersymmetry lead to a unique locally supergauge-invnrii~!~~ theory of spin-2 and spin-3/2 particles. We draw similar conclusions for a model uniting supergmvity and the Wess-Zurnino scalar multiplrt.

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