The author establishes some basic credentials (experience in leadership positions, trainign and mentoring leaders) and indicates that the present book is his attempt to boil down everything he's learned about leadership in his career into 21 simple principles.

One of the most important truths he has learned is that leadership is leadership - no matter what industry, culture, or period in time, the basic principles have been the same.

There are also four foundational principles to keep in mind:

  1. Leadership can be learned. Your natural talents will make some principles easier to apply than others, but as in all skills, if you apply yourself, you can learn.
  2. Each of these laws can stand alone. Some complement others, but you can put them into practices individually.
  3. Each law has consequences. Apply it, and people will follow; neglect or violate it, and you will not be able to lead.
  4. Laws guide actions. Knowledge without application is of no benefit.

There's also the all-encompassing statement of audience: whether you are just beginning to exercise leadership or are a seasoned veteran, the knowledge will help you improve.