Alignment

Alignment is a way of quantifying Good, Evil, Law, or Chaos in Dungeons and Dragons. People, creatures, spells, objects, and places can have an alignment. Alignment has spawned more debates and motivational posters then anything else in D&D.
Alignment threads now belong in /co/ after we swapped them for Empowered. Post alignment threads at risk of sagebombing.
Taking alignment seriously in any way entails failure because it tries to simplify and categorise something philosophers, sociologists, theologists and psychologists have been debating for thousands of years with no tangible results. A famous example shows the goddamn Batman in various periods of his comic and his actions and words correspond to pretty much all existing alignments. Recent developments in D&D (Eberron, 4th Edition) have been relaxing and ignoring the old rigid structure.