Key points are not available for this paper at this time.
The hierarchy problem of the scalar sector of the standard model is reformulated, emphasizing the role of experimental facts that may suggest the existence of a new physics large mass scale, for instance, indications of the instability of matter or indications in favor of massive neutrinos. In the seesaw model for the neutrino masses a hierarchy problem arises if the mass of the right-handed neutrinos is larger than approximately 10^7GeV: this problem, and its possible solutions, are discussed.
Francesco Vissani (Mon,) studied this question.