the philosophy of biology:a view to the human nature

the writer renders two views of the human charater from biological perspective. 1.that man is devoid of character. 1.1.the concept of man is discussed under broader notion of ©species¨.unlike philosophers, biologistes study all living things, they do not restrict themselves to man and the living things genetically related to him .also,they are concerned with real types. 1.2.upon the question that whether man is good or bad, it is within the limits of essentialist theory. 1.3. in essentialistic view to ©species ¨, up to the 20th c. animals used to be classified according to species, genus, family, order, class, and phylum.it has been put aside after the death of charles darvin.