It is self-evident that people are not completely similar in appearance, as there are different variations in natural phenotypic characteristics, all or some of which are transmitted from father to son. As for what we call "human races," they are nothing but human groups that are relatively consistent in these apparent natural characteristics. These races do not differ only in appearance, but they usually differ in levels of development and progress. Some of them enjoy all the benefits of advanced civilization, while some lag behind this level to varying degrees. This fact is the source and origin of theories of racial discrimination in all stages of their development.
The truth is that religions do not care about individual physical differences, and consider all people to be equal brothers in the eyes of God, and that all nations are of one blood (Adam and Eve), created to live above the surface of the earth.