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We revisit the work by Volkov and Soroka on spontaneously broken localsupersymmetry. It is demonstrated for the first time that, for specially chosenparameters of the theory, the Volkov-Soroka action is invariant under twodifferent local supersymmetries. One of them is present for arbitrary values ofthe parameters and acts on the Goldstino, while the other supersymmetry emergesonly in a special case and leaves the Goldstino invariant. The former can beused to gauge away the Goldstino, and then the resulting action coincides withthat proposed by Deser and Zumino for consistent supergravity in thefirst-order formalism. In this sense, pure $\mathcal{N} = 1$ supergravity is aspecial case of the Volkov-Soroka theory, although it was not discovered bythese authors. We also explain how the Volkov-Soroka approach allows one tonaturally arrive at the 1.5 formalism. Our analysis provides a nonlinearrealisation approach to construct unbroken $\mathcal{N} = 1$ Poincar\'esupergravity.

Local supersymmetry: Variations on a theme by Volkov and Soroka