As far back as required to make those involved feel as if they were compensated. If you feel that 36x Great uncle Olaf's loss affects your Family Today, then you should have your day in Court to make the case. However, as most likely 36x Great uncle Olaf was in fact not involved in anything in a currently oppressed People's past, it'll be a hard case to make.
How far back in time are we going to enact justice? My 36x Great uncle Olaf never got his comeuppance (/s a little)
As far back as required to make those involved feel as if they were compensated. If you feel that 36x Great uncle Olaf's loss affects your Family Today, then you should have your day in Court to make the case. However, as most likely 36x Great uncle Olaf was in fact not involved in anything in a currently oppressed People's past, it'll be a hard case to make.