This book presents the ideas of the world's great philosophers. It is a perfect introduction for the uninitiated reader to the study of philosophy, and it can serve as a supplement for any humanities course. It is an excellent text for introducing high school students to philosophy, a perfect research tool into the ideas of the world's great philosophers, and it is more effective than "Cliff Notes" for college students. The book is divided into four sections: How to think in an objective manner, Moral philosophy, Political philosophy, and Economic philosophy. Within each of the last three sections, the ideas of several thinkers are presented with thematic, as well as chronological emphasis. Underlying premises are compared and conclusions are analyzed. Readers are encouraged to develop their own moral, political and economic philosophy, and are stimulated to recognize and resolve contradictions in their own thinking.