  We discuss the possibility that fermionic condensates arise from the
dominance of scalar exchange forces over vector gluon exchange. When a scalar
in the adjoint representation is exchanged in the reaction $A+A \to A+A$, the
usual most attractive channel (MAC) rule is reversed in sign, with the
consequence that the formation of a condensate with the largest possible
Casimir is favored. More generally, when a scalar in a general representation
is exchanged in the reaction $A+B \to B+A$, the group theoretic sum giving the
force sign and strength can be expressed in terms of a Racah coefficient for
the group in question. We illustrate the formalism in the case of the group
SU(2), and give possible applications to SO(10) and $E_6$ grand unification.
