  We will show how a universal and Froissart-like (i.e., of the kind "B log^2
s") hadron-hadron total cross section can emerge in QCD asymptotically at high
energy, finding indications for this behavior from the lattice. The functional
integral approach provides the natural setting for achieving this result, since
it encodes the energy dependence of hadronic scattering amplitudes in a single
elementary object, i.e., a proper correlation function of two Wilson loops.
