Earth
Earthlings were originally a species with no formal contact with other planets. However, it seems that there are quite a few species, such as Namekians, Saiyans, and three-eyed people, who have drifted to Earth and are now living as Earthlings. In fact, it is also true that Saiyans who have naturalized on Earth have had offspring with Earthlings. This also suggests that humans tend to accept other species without any resistance. That's because humans on Earth are originally made up of three completely different types of people, all of whom look completely different. These are "human type," "animal type," and "monster type." Furthermore, even within each type of human, there are many who look completely different. This suggests that a morality of not discriminating against humans based on their appearance has naturally developed among Earthlings.
Now, the proportions of the three types of Earthlings are as shown in Figure 1. First of all, the most populous type is the human form, which comes in a variety of skin colors, hair colors, eye colors, etc. It is also known that humans and Saiyans can have offspring. Most humanoid Earthlings do not possess any special powers, but a small minority possess outstanding powers that could be considered special abilities. For example, various abilities have been confirmed, such as those with genius minds like Bulma and Dr. Briefs, those whose personalities change every time they sneeze like Lunch, and those who can use psychic powers like Chiaozu.
The next most common type is the animal type. Although they look like animals, they are characterized by their human-like behavior, such as speaking human language, handling weapons, and using wisdom. The animal forms consist of a variety of different types, all with very different appearances. Some of them are animal-type beings with special powers, such as Oolong and Pu'er, who have mastered transformation techniques, or Rabbit Carrot, who can turn anyone he touches into a carrot. It has also been revealed that there is a facility called a transformation kindergarten for animal-like Earthlings. Unusually for the DB world, Bee the dog cannot speak any human language and is classified as an "animal" living on Earth, and does not belong to the animal-type Earthlings.
Finally, the monster type. Representative examples include King Pilaf, Mummy-kun, Dracula Man, and Suke-san. They are characterized by their extremely unique appearance, and many of them possess mysterious powers. Incidentally, it is believed that the numbers of both animal and monster species are gradually decreasing because it is difficult for different species to produce offspring. In addition to the three human races, monsters such as Giran and Buyon, and animals such as the sea turtle and Bee also coexist on Earth. Earthlings, whose home planet is said to be extremely beautiful even when viewed from the perspective of the entire universe, are often targeted by demons and evil aliens. Among Earthlings, there are some who, like the RR Army, plot to conquer the world, and ordinary Earthlings who have no fighting ability often become victims of these battles. At one point, the human race was even pushed to the brink of extinction. Each time, it is saved by Goku and the others, or revived by the power of the Dragon Balls. However, the average Earthling is unaware of the existence of the Dragon Balls or Goku and the others, and many live lives unrelated to fighting.