D&D is strongly rooted in the duality of Dark/Light (and the tones black/white) as an equivalent for Evil/Good. This is tiring for a number of reasons both as a GM and as a player. While examples of this trope are scattered throughout the 3 rulebooks of D&D 5e, I have not found any D&D source material that explains how darkness came to be an attribute of evil, and how light came to be an attribute of good. Outside of icy terrains (i.e. white dragons, yetis, etc.) evil Is overwhelmingly associated with darkness and the color black, and good is overwhelmingly associated with light and white.
This is my question:
Is there any published D&D lore that established, within the D&D multiverse, the connection between dark and evil, and between light and good? If so, which D&D book(s) contain this lore?
To clarify, I would like to know if there is any D&D lore that establishes, in the D&D universe, the strong inclination for evil beings to be associated with darkness, and good beings to be associated with light. I am not interested in cultural, social, political, historical influences from the real world. I am also not at all interested in the intent of the game dessigners. This question is about lore, mythology, arcana, etc. written in D&D published material.
Here are some initial references from the PHB which show evil equated with darkness. More references to come from DMG and MM as well as references equating light with good (it's a long list). To be clear these references all equate evil or related attributes such as hideousness and treachery with the quality of darkness. These do not use the term "dark" as a replacement for the word "evil" which is a semantic decision and not in the scope of this question.
- (6) The halflings of the Dark Sun setting, for example, are jungle-dwelling cannibals.
- (20) ... live the duergar, or gray dwarves. These vicious, stealthy slave traders raid the surface world for captives, then sell their prey to the other races of the Underdark.
- (25) dark elves, who are commonly called drow ... their exile into the Underdark has made them vicious and dangerous. Drow are more often evil than not.
- (26) Dark Elf (Drow) Descended from an earlier subrace of dark-skinned elves, the drow were banished from the surface world for following the goddess Lolth down the path to evil and corruption.
- (26) Also called dark elves, the drow have black skin that resembles polished obsidian
- (81) the order of the Dark Moon is made up of monks dedicated to Shar (goddess of loss)
- (82) he jabs again and again at a twisted giant, until at last his light overcomes its hideous darkness.
- (82) to stand with the good things of the world against the encroaching darkness, and to hunt the forces of evil wherever they lurk.
- (86) paladins who swear this oath cast their lot with the side of the light in the cosmic struggle against darkness because they love the beautiful and life-giving things of the world
- (251) a gateway to the dark between the stars, a region infested with unknown horrors
- (293) evil cults perform dark sacrifices in subterranean lairs
- (293) Various mad cults are devoted to the demons and horrors imprisoned in Eberron's Underdark
- (294) Shar, goddess of darkness and loss
- (300) Its dark reflection is the Negative Plane, the source of necrotic energy that destroys the living and animates the undead.
- (9) The populace lives in perpetual terror of these darklords and their evil minions
- (10) Zehir, god of darkness and poison
- (38) you'll find a dark, gritty world of evil sorcerers and decadent cities
- (40) Necromancers toil in dark dungeons to create horrid servants made of dead flesh
- (44) Tartarus, where the titans are imprisoned in endless darkness, lies below Hades
- (44) It has dark, evil regions (homes of fiends and evil gods)
- (49) The darker regions of the plane are home to such malevolent creatures
- (50) It is a place of darkness that hates the light
- (50) A forest on the Shadowfell is dark and twisted, its branches reaching out to snare travelers' cloaks
- (52) The city of Neverwinter in the world of the Forgotten Realms has a dark reflection on the Shadowfell: the city of Evernight. Evernight is a city of cracked stone edifices and homes of rotten wood.
- (56) ... are called the Darkened Depths. Horrid creatures dwell here ...
- (64) a fortress city cast of obsidian and dark glass. With rivers of molten lava pouring down its outer walls, the city resembles the sculpted centerpiece of a gigantic, hellish fountain
- (66) Nessus is a realm of dark pits whose walls are set with fortresses. There, pit fiend generals loyal to Asmodeus garrison their diabolical legions and plot the conquest of the multiverse.
- (97) ... or serve an evil power. Whatever light burned in the paladin's heart has been extinguished. Only darkness remains.
- (222) ... where its moral guidance can bring light to a darkened world ...
- (223) … a foul language known as Dark Speech