When the Roman Empire became the Holy Roman Empire, the lions were not set free. The games continued under new management.My point is that "anything goes" can sometimes happen like innocent(?) slave girls being fed to lions for entertainment.No kidding. And animals have already shown ‘anything goes’ isn’t a natural state for social communities. They managed it without god.
The Christains just started throwing Pagans to them.
Because morality, i guess...?