A new generation of experiments is being planned with a significant improvement
 in the sensitivity to electric dipole moments (EDMs) of  the nucleon and light
 nuclei. Possible signals in these measurements  would reflect time-reversal 
violation (TV) beyond that stemming from  the phase of the CKM matrix. Could we
 then infer the origin of TV at  the quark/gluon level?

I describe our on-going program to relate nucleon and light-nuclear TV 
observables to various TV sources, such as the QCD theta term, quark EDMs, 
quark and gluon color-EDMs, etc. We use the effective field theory of QCD that 
is applicable to hadronic momenta of order of the pion mass - a generalization 
of chiral perturbation theory - and can handle one- and many-nucleon physics 
consistently. I argue that light nuclei could offer the key to disentangle TV 
sources.