This course introduces students to the subject of philosophy. It begins with how philosophy can be defined in terms of its nature and task, then to its major branches. After providing such definitions it introduces students to the origin of western philosophy from the Father of western philosophy Thales and the rest of the pre-Socratics then on to the Greek Humanists, namely, the Sophists; Socrates; Plato and Aristotle. Students are introduced to the philosophical views and contributions of these ancient Greek philosophers who have initiated and developed what we know as western philosophy. These studies are important because much of our present day social, political and economic theories and systems have their roots in the philosophical discourses of those ancient philosophers and they are still valid and valuable for our lives today.