  Supersymmetric vacua are stable. It is interesting to ask: how long-lived are
vacua which are nearly supersymmetric? This question is relevant if our
universe is approximately supersymmetric. It is also of importance for a number
of issues of the physics of the landscape and eternal inflation. In this note,
we distinguish a variety of cases. In all of them the decay is slow. For a flat
space theory decaying to a deep AdS vacuum, the leading behavior of the decay
amplitude, if a thin wall approximation is valid, is ${\cal A} = \gamma e^{-2
\pi^2/({\rm Re} m_{3/2})^2}$ (where the phase of $m_{3/2}$ is defined in the
text) for ${\rm Re} m_{3/2}>0$, and zero otherwise. Metastable supersymmetry
breaking generally yields parametrically more rapid decays. For nearly
supersymmetric decays, we will see that it is necessary to compute subleading
terms in the exponential to extraordinarily high accuracy before one can
meaningfully discuss the prefactor.
