  I shortly review the present status of the theoretical estimates of eps'/eps.
I consider a few aspects of the theoretical calculations which may be relevant
in understanding the present experimental results. In particular, I discuss the
role of final state interactions and in general of non-factorizable
contributions for the explanation of the Delta I = 1/2 selection rule in kaon
decays and eps'/eps. Lacking reliable ``first principle'' calculations,
phenomenological approaches may help in understanding correlations among
theoretical effects and the experimental data. The same dynamics which
underlies the CP conserving selection rule drives eps'/eps in the range of the
recent experimental measurements.
