DOTU: #3 A little on Drow Alignment

The drow are a highly chaotic, individualistic people, a fact addressed multiple times throughout this chapter. They worship a deity who dwells in the Abyss and is a paragon of chaotic evil. Yet for all that, the Monster Manual gives drow alignment as “usually neutral evil.”

The truth is, the drow are at least somewhat cooperative with one another, almost in spite of their own nature. Their ambitions and desires require that their society remain at least somewhat stable. They employ few true laws, but they are tightly bound by traditions and codes, and even if they follow them primarily out of fear, they follow them nonetheless. It is ironic that a lone drow is likely to drift toward chaos, but that despite their rivalry with one another, the presence of multiple drow in a given community literally forces them into a level of cooperation beyond what truly chaotic individuals would maintain.