Ferengi are actually closest to Norse/Vikings in human terms. If the culture they run into is weaker than them, they raid, and if is is stronger, they trade, all the while slowly spreading their influence everywhere. I think the 'raiding' aspect may have dialed-back from first season TNG, after they realized just how big and strong the Federation was, and how much more lucrative all those new markets would be over simple raiding. Still, their government is setup in such a way as the 'official' Ferengi government can disavow any ship/DaiMon as not acting on their government's behalf, which is very smart way of allowing individual ships to still raid (when they have an opportunity) and not take diplomatic hits for it.