We systematically study the minimal supersymmetric Pati-Salam theory, paying special attention to the unification constraints. We find that the $\mathrm{SU}{(4)}_{c}$ scale ${M}_{c}$ and the left-right scale ${M}_{R}$ lie in the range ${10}^{10}\mathrm{GeV}<{M}_{c}<{10}^{14}\mathrm{GeV},$ ${10}^{3}\mathrm{GeV}<{M}_{R}<{10}^{10}\mathrm{GeV}$ (with single-step breaking at ${10}^{10}\mathrm{GeV}),$ giving a potentially accessible scale of parity breaking. The theory includes the possibility of having doubly charged supermultiplets at the supersymmetry breaking scale, color octet states with a mass $\ensuremath{\sim}{M}_{R}^{2}{/M}_{c},$ magnetic monopoles of intermediate mass that do not conflict with cosmology, and a ``clean'' (type I) form for the seesaw mechanism of the neutrino mass.