Sepratism Why it happens!

I have done some great thinking and came up with the theory of sepratism.

Homosapiens, why dont they get a long?

Is it thier Race?
Is it thier religion?
Is it from the origin they have originated from?

The answer to all this is "Yes".

Let me explain how in the easiest form.

Think of the Feline family, Lions, Tigers, cheetahs, leopards, cougars, Mt lions, Bobcats, domestic cats ..etc.

Now, try to understand this; They are all felines, as we are humans, thier individual identities come from thier environments, climate etc.. Just as humans do. In this we find something that brings great balance, each of these felines cannot live amongst one another without destroying each other. As to what we find amongst diffrent races of human beings.

Felines have found balance within sepratism by living amongst thier own feline family ..ie Tigers with Tigers , Lions with Lions, Leapords with leapords etc..etc.

My question next would be, Should we follow thier steps to make a better world and live as they do? Having each Race from each origin live amongst themselves to bring balance back to the world?