In the Dungeons & Dragons world, racial traits are a guideline and a tendency, but never an iron rule. In the works of R.A. Salvatore, Drizz’t was a good-hearted drow ranger, despite the fact that drow tend to be evil. That’s why it’s possible to have good orcs and evil halflings. Every life-form that can think can make its own choices. Its society, however, has its own history and its own tendencies. While some good-alignment orcs might choose to marry and breed with elves, their society has a dark history with elves that, again, begins with Gruumsh. Corellon Larethian is the leader of the elven pantheon of gods and something of a trickster. How in particular Gruumsh and the elven god crossed paths and came to blows is unclear. What is clear is that a fierce battle ensued and Corellon Larethian removed or attempted to remove Gruumsh’s eye. Since then, orcs have had an unquenchable enmity for elves. As a societal rule, when orcs capture elves, they kill them on site, no parlay, no prisoners, and no breeding.