  We propose a novel framework in which the observed baryon and dark matter
abundances are simultaneously generated via the Affleck-Dine mechanism. In its
simplest realization, Affleck-Dine cogenesis is accomplished by a single
superpotential operator and its A-term counterpart. These operators explicitly
break B-L and X, the dark matter number, to the diagonal B-L+X. In the early
universe these operators stabilize supersymmetric flat directions carrying
non-zero B-L and X, and impart the requisite CP violation for asymmetry
generation. Because B-L+X is preserved, the resulting B-L and X asymmetries are
equal and opposite, though this precise relation may be relaxed if B-L and X
are violated separately by additional operators. Our dark matter candidate is
stabilized by R-parity and acquires an asymmetric abundance due to its non-zero
X number. For a dark matter mass of order a few GeV, one naturally obtains the
observed ratio of energy densities today, Omega_{DM}/Omega_B \sim 5. These
theories typically predict macroscopic lifetimes for the lightest observable
supersymmetric particle as it decays to the dark matter.
