maybe i am wrong but one society that comes immediately to mind is the greeks. they invented a lot of the legal system that we use. and i use them as my example because it seems that they were moral in spite of their gods. the pantheon of greek gods and demi-gods are a petty capricious and vengeful lot, this is just my opinion, i am just putting it out there, don't shoot the messenger.
ps-dig those crazy pop-culture references shadow man!
when knowledge is outlawed...only outlaws will have knowledge