Faith of Faerun
Across all of Faerûn, people respect and fear the divine powers. The deities of Faerun take an active role in the world, promoting the causes they favor, watching over the domains for which they ware responsible, and constantly seeking to increase (or at least defend) their temporal power by protecting their worshipers and encouraging the active expansion of their faiths.
Mortals who deny the deities who made the world and govern its basic forces rare indeed, although a few powerful beings such as the enigmatic sharns and phaerimms acknowledge no entity as their superior. Human (and humanoid) souls who refuse the gods come to a bad end after death, lacking a deity to speak for them upon the Fugue Plane. What befalls primal creatures such as the sharns, no one can say.
Some Faerunians zealously follow one deity. Others make sacrifices to many deities, while upholding one as their personal patron. Still others sacrifice to as many deities as possible, shifting allegiances as their circumstances and needs warrant. It’s a rare Faerunian who hasn’t occasionally hoped o avert the baleful influence of an evil deity with a propitious gift, or thanked a good power for an unexpected blessing. The belief system of most Faerunians generally centers on a particular deity whose interests and influences are most likely to affect them, but acknowledges other gods as significant and important, too.
Divine magic can play a significant role in society, but not always through the direct intercession of a cleric or druid wielding divine spells. Deities of prosperity and plenty such as Chauntea answer their worshipers’ prayers with abundant harvests and fair weather. Gods of plague and famine—Talona, primarily—demand placation and send all manner of blights and epidemics against those foolish enough to deny their power. These supernatural influences tend to balance each other, with the extremes of bounty and famine generally unlikely to occur. Chauntea finds a way to bring forth some sustenance in even the worst blights, and Talona manages to mar even the most plentiful harvest in some small way.