It is transparently obvious to most unbiased people that ancient people were generally more superstitious and gullible than modern people. This isn't a criticism. It's just an obvious truism. Modern people have the advantage of more learning. We can stand on the shoulders of the geniuses that preceded us and so we have view of the world that is better informed. I've had discussions with Christians that want to deny this truism. It is apparent that the writers at Family Guy get it.