Humans are the most influential race in Faerun. Humans can be any class and are the only race that can dual-class.
Listed below are the human sub-races.

Aasimar

Aasimar carry the blood of a celestial, the begotten offspring from the union of a mortal and a deity. Aasimar are usually good-aligned and fight against evil in the world. They typically have fair skin, golden eyes, and often a birthmark in the shape of the deity's holy symbol. Aasimar are blessed with insight and personal magnetism and are typically Paladins. They are considered wise and charismatic and are able to cast Sunscorch innately but at a cost to their experience points earned.

Tiefling

The infernal counterpart to aasimar, tieflings are humans with a hint of the diabolical in their bloodline. Though their appearance is mostly human, they often have tell-tale signs that belie their ancestry. Tieflings usually have dusky skin and dark or reddish hair. Though many sport small horns, cat eyes, or other bizarre features, most tieflings try to hide their abnormalities from humans. Tieflings are inherently intelligent and agile. They can also cast Blindness. These benefits come at the price of reduced Charisma and a cost to their experience points earned.