scale $\tilde{m} \sim \mu_c$. From Fig. \[fig:scale\_lambda\], $\mu_c \sim 10^9~\mbox{--}10^{13}~{\rm GeV}$ at 1-$\sigma$ (allowing for the possibility of a TeV-scale wino for dark matter).

-   States of a minimal supersymmetric grand unified theory at $\tilde{m}$ can account for precision gauge coupling unification.

In addition to these, in this paper we study ISS models that have a third key feature

-   Below the cutoff scale of the theory $\Lambda$, which is likely close to the Planck mass, the theory possesses only a single mass scale, $\tilde{m}$.

In this paper we study two different aspects of ISS. In Section \[sec:model\], we pursue a class of ISS models that lead more cleanly to the vanishing of the quartic coupling near $\tilde{m}$, have a new proton decay signal and are more elegant. In Section \[sec:scales\], we argue that in ISS the mass scale $\tilde{m}$ may be identified with one or more key mass scales of new physics: the axion decay constant, the energy scale of inflation, and the seesaw scale for neutrino masses.

ISS provides a unifying theme to the diverse physics that we discuss, since it is all triggered by the same underlying mass scale. The scale $\tilde{m}$ directly gives the superpartner masses 