Bertrand Russell, at his Nobel Prize Acceptance Speech, pointed out that all human activity is prompted by desire. If you want to know what man will do, you must know the whole system of their desires with their relative strengths.

Humans have some infinite desire...

Living creatures can be found of every aspects, types and species, it's our intellgence which allowed us to dominate our world. Even in human beings we are equally distributed and evolved everywhere, ranging from black to white, small foot to big foot.

When a living being cannot fit in this...