Because of the way the book is organized, it may be used at a variety of levels of rigor. For example, if matrix algebra is used, theoretical exercises may be omitted. A CD of data sets is provided with the text.

    Now he turns to the most important subject of all - understanding people's drives and motivations, even when they are unconscious of them themselves.We are social animals. Our very lives depend on our relationships with people. Knowing why people do what they do is the most important tool we can possess, without which our other talents can only take us so far. Drawing from the ideas and examples of Pericles, Queen Elizabeth I, Martin Luther King Jr, and many others, Greene teaches us how to detach ourselves from our own emotions and master self-control, how to develop the empathy that leads to insight, how to look behind people's masks, and how to resist conformity to develop your singular sense of purpose. Whether at work, in relationships, or in shaping the world around you, The Laws of Human Nature offers brilliant tactics for success, self-improvement, and self-defense.

    The principles of individual liberty, the rule of law, government by consent of the people, and the right to private property are taken for granted as fundamental to the human condition now. Most liberal theorists writing today look back to Locke as the source of their ideas. Some maintain that religious fundamentalism, "post-modernism," and socialism are today the only remaining ideological threats to liberalism. To the extent that this is true, these ideologies are ultimately attacks on the ideas that Locke, arguably more than any other, helped to make the universal vocabulary of political discourse.