Humans are the core race of current civilization. Humans are incredibly fast learners, and are extremely adaptable to all sorts of situations and environments. They are secretly envied by all other races for their unfathomable ability to excel at anything they put their minds to.
Humans can be members of any guild, and can do quite well in any profession. In all but the most segregated of societies, humans can advance to high stature in the governments and nobilities of any kingdom.