The world is ancient and many civilizations have come and gone before now. Modern territories are built upon ancient ruins and the buried dens of terrible creatures. No one knows what eldritch evils and powerful magics lie hidden in the dark places of the world.
Magic and magic users are rare and almost unknown to the people of the land. There are a scant handful of people able to tap into magic, to the point where an average citizen may not even believe in magic. Even those magic users that do exist are not terribly powerful. Similarly, most clerics and paladins in the world are unable to channel the divine power of their gods.