All human beings have evolved from a common ancestor as they have maximum number of common characters. Moreover, all human beings can interbreed with each other which shows that all of them belong to same species. Some of the common characters of all human beings are –
↳ Body hairs.
↳ Similar body design.
↳ Similar brain size.
↳ Ability to handle tools.
↳ Ability to communicate.
↳ Bipedal locomotion.
↳ Highly complex social behaviour.