Since human existence is still relatively recent compared with other animals
there is little difference between the species.
. For example, if we compare the Doberman
Chihuahua and bulldog, their skeletal structures have entirely different proportion
In contrast, although the skin and hair color of Caucasians
Africans, Asians and People of mixed blood differ,
their skeletal structures have approximately the same relative proportion.
Such a species, i.e. the human being with few individual structural differentces can be drawn by studying certain fixed principles.