Absence of Light
The Morass seems a forsaken land that the Gods and even time itself forgot about. No-one knows when or where the fair races departed, but the absence of such has left a land where civilisation and society are an option few have chosen. Left to their own devices, the humanoids do as they please, with only a scattering choosing to settle in haphazard towns and the majority engaged in barbaric raiding and nomadic hunter-gathering.
Certainly the humanoids don’t concern themselves with the reasoning as to why the fair races are gone, but anyone caring enough would assume that some darker or malignant force must be involved in their disappearance, be it directly or indirectly. Little does everyone know that the only possible salvation lies in the most unlikely of adventurers, in the most unlikely of locations….