Man is an animal and Aristotle was wrong about many, many things. Man is an an animal made unique by its brain. While some animals evolved ways to spit venom, or fly, or see in the dark, humans have a powerful brain that gives them the problem-solving ability to create almost anything. A few million years ago, there were many different species of the genus homo. One by one, they all went extinct, leaving only Homo Erectus, Homo Neanderthal, and Homo Sapiens as the three "human" species. Climate change, migration, and tribal warfare led to the eventual extinction of erectus and, around 30,000 years ago, Neanderthal as well.
Sapiens evolved further and developed bigger brains that now make it almost impossible for our species to give a natural birth. We've reached an evolutionary dead end. Humankind's existence has been one of struggle between intellectual reason and base animal instincts. Primitive instincts include a desire to be leader of the pack, to seek wealth and compete with or outdo others in life, to commit sexual excesses, to be jealous, to murder and steal, and to conquer and annihilate other cultures. Intellectual reason forsakes all of these impulses that keep us as hairless apes who can make complex weapons. Human culture has made slow and steady progress toward reason by first accepting science over religious superstition; later, by the abolition of slavery in most parts of the world. Next, came the acknowledgement of the equal rights of female humans. This process of progressivism is continuing into areas of imperialism, environment, and even economics, though there are signs of retraction back into a dark age.