  We explore the possibility that quantum cosmology considerations could
provide a selection principle in the landscape of string vacua. We propose that
the universe emerged from the string era in a thermally excited state and
determine, within a mini-superspace model, the probability of tunneling to
different points on the landscape. We find that the potential energy of the
tunneling end point from which the universe emerges and begins its classical
evolution is determined by the primordial temperature. By taking into account
some generic properties of the moduli potential we then argue that the
tunneling to the tail of the moduli potentials is disfavored, that the most
likely emergence point is near an extremum, and that this extremum is not
likely to be in the outer region of moduli space where the compact volume is
very large and the string coupling very weak. As a concrete example we discuss
the application of our arguments to the KKLT model of moduli stabilization.
