And even if they are, as soon as they are born, some quickly become superior. Some do not. The superior people run the world, using the inferior ones to generate profits.
Superior people receive better educations.
The inferior ones get whatever education is provided locally. Superior people hold desirable jobs and receive better pay. Inferior ones fill those jobs least desired. Superior people raise enough money to become elected officials, working with the superior owners of business and wealth to direct the lives of the inferior. Superior people become celebrities, being loved, hated and respected by the inferior.