The primary race stock in the city-states is human. Fast to multiply, adaptable, and ambitious, humans form the bulk of the population in all city-states. Because of their numbers, they hold all the political power, as well. While more civilized than the brutal races of the interior, memories of race wars from a century ago remain, and political power is not generally entrusted to the “off-races” beyond low-level bureaucratic ones.
Humans use the default rules for humans in the Players Handbook.