  A scenario is suggested for spontaneous CP violation in non-SUSY and SUSY
SU(10). The idea is to have a scalar potential which generates spontaneously a
phase, at the high scale, in the VEV that gives a mass to the RH neutrinos. The
case of the minimal renormalizable SUSY SO(10) is discussed in detail. The high
scale CP breaking induces a phase in the CKM matrix as well. It is also pointed
out that, in these models, the scales of Baryogenesis, Seesaw, Spontaneous CP
violation and Spontaneous U(1)_QP breaking are all of the same order of
magnitude.
