In my opinion, it doesn't really matter how historical those stories are. What was important was the message. Even from the little I have read it is very obvious that the Romans had very little respect for the sacredness of life. It says right in Genesis that we were created in God's image, and therefore are sacred. I am sure Caecilius could elaborate on that idea. I would not say that Christianity is perfect, but I do believe it planted a seed that has grown over time. Humanity is still far from perfect but at least we no longer are killing each other for sport.