Humans

Human beings are the dominant race in the world, as they outnumber most other races, and are usually among the most technologically advanced and organized of the races. Most islands are inhabited by humans, even in the Grand Line, where most of the stronger races such as the fish-men and giants are found. 

Appearance

Humans come in a range of sizes, ranging from "normal" to much taller (such as Jerry). Some, such as Gecko Moria and Charlotte Linlin, are extremely large for human standards; Linlin is 880 cm (28'10") tall, far surpassing an average human's height by roughly six times. However, these humans remain small compared to giants, who have a minimum height of 12 meters (around 40 feet). These large humans are roughly the same size as Wotans. Some humans have features that are unique, such as Usopp's long nose, which led to people mistaking him for a fish-man in Cocoyasi Village.

Some humans have an ape-like appearance such as Masira, Shoujou, the Utan Divers, Hamburg and the Coffee Monkeys; Masira claimed openly to be human and not ape, although he was not insulted when called a "monkey". Humans with demonic features have also appeared in the storyline (mainly in the Impel Down Arc) and have traits such as pointed ears, sharp teeth and intimidating facial features; Gecko Moria is notably demonic in appearance, having white skin, pointed ears and even small horns on his forehead. A few humans have even been seen with goat or sheep-like horns growing on their heads, such as Merry and Caesar Clown. Even amongst families, size and proportional differences may occur, the most prominent example being the Gorgon Sisters. Some humans can be born with abnormally long skulls, as shown by the likes of Strawberry and Chinjao, with the top of their heads being quite tall, however it appears this trait is not hereditary as Chinjao's own grandchildren lack this feature.

Overall Strength

Most of the inhabitants of the One Piece world are normal humans, and are one of the weakest races on the planet. While the average human is as weak as in real life, with enough training, they are able to become Superhumans- normal humans with high levels of physical strength. They can also train to gain incredible abilities. Some humans like Koala have demonstrated that humans can learn Fish-Man Karate, despite not being Fish-Men themselves. Many humans have developed a variety of martial arts styles to defend themselves with such as Black Leg Style and Hasshoken. Additionally humans often wield swords and other weapons to compensate. Several human swordsmen are shown to be extremely powerful individuals such as Zoro, Shanks, Kyros, Ryuma (when he was alive), and world's strongest swordsman Dracule Mihawk. In addition, normal humans are more likely to consider eating Devil Fruits to compensate for their lower physical abilities.

There is also a Zoan Devil Fruit called Hito Hito no Mi which grants any animal that eats it human abilities such as intelligence, speech, and the ability to take a human hybrid form and full human form, as seen with its current user the Drum Island reindeer, Tony Tony Chopper. Using his human intelligence the fruit granted him, Tony Tony Chopper developed the Rumble Ball to grant him further transformations.