Who is Aristotle from The Greek Way and what is their importance?

This student of Plato at the Academy reached maturity in the fourth century B.C.. By the middle of the fourth century, Aristotle established a school of his own called "the Lyceum." Aristotle is of the greatest importance for the later development of philosophical thought. His focus was on understanding the complex nature of the world. He rejected Plato's theory of forms and believed they are not unchanging. Aristotle concluded that the highest form, "the good" means different things for different creatures. Humans, he said, must come to an understanding of their own unique nature and derive from that the meaning of happiness and virtue.