This was my first exposure to Rapoport, and this is a philosopher to whom I will return. I already have checked out another of his works after reading this one. Sometimes when reading older works, one needs to skip over sections, and forgive the author for what have since become egregious errors. Other times one stands in salute to a writer whose thoughts are impressively "before their time". Most of what R- writes in this book sounds relevant today. And the book itself is clear, concise, forceful, and in my estimation largely useful for philosophers today. Feel free to skip the middle section on ethics.