Many people may not be aware that most of the contemporary works of philosophy borrow heavily from the thoughts of Aristotle an ancient Greek philosopher who lived between 384B.C and 322B.B.C. Aristotle had a great influence on the on ancient worlds history. He was a student of Plato and later became a teacher of Alexander the Great. During the period that he lived he wrote several books on virtually all subjects; from physics to philosophy. His main contribution was on happiness the virtues deliberation justice and friendship. His influence on the western thought was profound and it was not limited to philosophy. He contributed to science formal logic and philosophy studies. His books are highly recommended for those interested in the study of philosophy Aristotles life as well s history.