  We discuss the possibility that the vacuum is dynamically determined in the
history of the universe. The point is that some of the bubbles with a certain
vacuum shrink by the evolution of the universe via gravity and may become black
holes. When the temperature of the phase transition T_{PT} is higher than 10^9
GeV, these black holes evaporate until now. If T_{PT}<10^9 GeV, we may see
these black holes in our universe. It is interesting that in many cases false
vacua are favored in the context of cosmology. By using this argument,
supersymmetry(SUSY), if it exists, can be broken cosmologically. We can guess
the SUSY breaking scale from the mass of the black holes.
