Explain why the paragraph a below show a contradiction in theory: animal should serve as model for us.

Explain why the paragraph a below show a contradiction in theory:

animal should serve as model for us. they are gentle, cooperative, and family- oriented creature who fight mainly over territory and mates rarely kill one another; their combat is only ritualistic to show the hierarchy of dominance. Human begins, on the other hand, engage in group warfare and slaughter one another by the millions. We are violent, competitive, an unfaithful to our mates, as beastly as any beast.