Humans make up the majority of the population within New York City — unsurprising as the city has over eight million living within its five borroughs.
Most humans are completely oblivious to the fact that there are supernatural beings that live among them, that work with them, that take the subway. There are the odd few who note something odd, can see ghosts without being able to interact with them, but the majority will chalk it up to New Age "mumbo-jumbo" or find some other way of rationalizing the unusual things they may see.
People have a tendency to rationalize what they can and forget what they can't.
— Rupert Giles, Buffy the Vampire Slayer
Humans are at a disadvantage in the city, having no supernatural abilities, and they often lack the perception of dangers that many supernaturals could pose to them.
However, humans aren't without their merits — they generally have a lot of strength of character, the sheer population of them in the city far outweighs that of the supernatural races, and they still (so far as they're aware) hold political power.
