  We propose a solution of the naturalness problem in the context of the
multiverse wavefunction without the anthropic argument. If we include
microscopic wormhole configurations in the path integral, the wave function
becomes a superposition of universes with various values of the coupling
constants such as the cosmological constant, the parameters in the Higgs
potential, and so on. We analyze the quantum state of the multiverse, and
evaluate the density matrix of one universe. We show that the coupling
constants induced by the wormholes are fixed in such a way that the density
matrix is maximized. In particular, the cosmological constant, which is in
general time-dependent, is chosen such that it takes an extremely small value
in the far future. We also discuss the gauge hierarchy problem and the strong
CP problem in this context. Our study predicts that the Higgs mass is 140\pm20
GeV and {\theta}=0.
