Aristotle was a Greek philosopher born in 384 BC. He studied at Plato's Academy and later founded his own school called the Lyceum. Aristotle made contributions to many fields including logic, metaphysics, politics, and natural sciences. He was a realist who believed that reality exists independently of the mind. Aristotle saw the universe as being in a balanced, orderly state. He believed education was essential for achieving happiness and that it created good citizens. However, he held that only men of noble birth and citizens should be educated, while women and slaves had lesser roles.