  We investigate the string configuration that, in the framework of the
theoretical scenario introduced in [1], corresponds to the most entropic
configuration in the phase space of all the configurations of the universe.
This describes a universe with four space-time dimensions, and the physical
content is phenomenologically compatible with the experimental observations and
measurements. Everything is determined in terms of the age of the universe,
with no room for freely-adjustable parameters. We discuss how one obtains the
known spectrum of particles and interactions, with massive neutrinos, no Higgs
boson, and supersymmetry broken at the Planck scale. Besides the computation of
masses and couplings, CKM matrix elements, cosmological constant, expansion
parameters of the universe etc..., all resulting, within the degree of the
approximation we used, in agreement with the experimental observations, we also
discuss how this scenario passes the tests provided by cosmology and the
constraints imposed by the physics of the primordial universe.
